Journal articles: 'Erbium doped fiber amplifier (EDFA)'

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Mohamad, Sufian, Arni Munira Markom, Norbaiti Sidik, Mukul Chandra Paul, and Sulaiman Wadi Harun. "Performance Comparison of Zirconia, Bismuth and Silica-doped Erbium Fiber for Optical Amplification." International Journal of Engineering & Technology 7, no. 4.22 (2018): 94–96. http://dx.doi.org/10.14419/ijet.v7i4.22.22197.

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Zirconia-based Erbium-doped fiber amplifier (Zr-EDFA) is improved material optical fiber with more than 4000 ppm erbium-doped concentration to solve global demand for huge capacity carrying data information, high speed transmission and long haul with specific devices of compactness. Thus, the length of Zr-EDFA is only 50 cm as gain medium. At input pump power -30 dBm, the highest optical gain is 34 dB (1530 nm wavelength) whereas 21 dB (1535 nm wavelength) at -10 dBm. Besides, the flatness gain 21 dB with fluctuation of 1 dB is recorded for Zr-EDFA. For performance comparison, Bismuth-based Erbium-doped fiber amplifier (Bi-EDFA) and Silica-based Erbium-doped fiber amplifier (Si-EDFA) were also investigated.Â Â

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AHMAD, HARITH, and SULAIMAN WADI HARUN. "DOUBLE PASS S-BAND EDFA." Journal of Nonlinear Optical Physics & Materials 15, no. 03 (2006): 303–7. http://dx.doi.org/10.1142/s0218863506003347.

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A double-pass erbium-doped fiber amplifier (EDFA) based on a depressed cladding erbium-doped fiber, which operates in the short wavelength (S-band) region is proposed and demonstrated. This amplifier provides a small signal gain as high as 30 dB at 1500 nm, using only 15 m depressed cladding erbium-doped fiber (EDF) and 130 mW of 980 nm pump power. Compared to the single-pass configuration, this amplifier shows a gain enhancement of about 14 dB for pump powers above 120 mW. However, noise figures penalties of less than 0.9 dB are obtained for these pump powers. The proposed double-pass amplifier will play an important role in the development of a practical S-band EDFA from the perspective of economical usage of EDF and pump power.

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Mohammad, Yusuf, and Bhandari Vijaya. "Enhancement in the Gain of EDFA in Fibre Optic Communication." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 2 (2019): 411–17. https://doi.org/10.35940/ijeat.F8422.129219.

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With the evolvement of high speed and long distance data communication systems, conventional band erbium-doped fiber amplifiers (C-EDFAs) are getting more attention in recent times. Major advantage of the C-band EDFA is that it provides the user to realize a system with wide bandwidth of 40 nm. But, from the reported works, it is evident that for Gain enhancement in C-band using EDFA is reported with the use of multiple stages, multiple pumps, Gain flattening filters etc. However, these techniques suffered from high cost, complex techniques and low performance. Here enhancement process was done through the narrowband Fiber Bragg Gratings (FBG) or fiber reflectors mirrors. In this work, a conventional band erbium doped fiber amplifier is proposed with high gain and less noise figure by incorporating the two fiber bragg gratings (FBGs) for amplified spontaneous noise reinjection. Maximum ASE is emerged at 1565 nm for the at -55 dBm carrier powers. Maximum gain is found out to be 48.16 dB with noise figure of 5.29 dBm.

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Alaruri, Sami D. "Gain, Noise Figure and Efficiency Characteristics of an L-Band Erbium Doped Fiber Amplifier." International Journal of Measurement Technologies and Instrumentation Engineering 2, no. 4 (2012): 1–11. http://dx.doi.org/10.4018/ijmtie.2012100101.

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In this work, the construction of a single stage L-band erbium-doped fiber amplifier which incorporates a short 5.1 m erbium doped fiber coil is described. Gain and noise figure measurements as a function of forward, backward and counter-propagating CW 1480 nm pumping schemes at different pump power levels are presented. Further, the Erbium Doped Fiber Amplifier (EDFA) power conversion efficiency (PCE) calculations as a function of pump power are provided.

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Ray, Biplob Kumar, Angshuman Majumdar, and Sankar Gangopadhyay. "Radial Differentiation of Pump and Signal Intensities in Trapezoidal index EDFA for LP11 mode in Kerr nonlinear state." September 2022 4, no. 3 (2022): 182–91. http://dx.doi.org/10.36548/jei.2022.3.006.

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An Erbium-Doped Fiber Amplifier (EDFA) is an in-line component in modern all –optical telecommunication infrastructure. Different parametric characteristics of an EDFA express the suitability and excellency of performance in its real field application. Intensities of pump and signal vary with distance from the core-axis along the radius of the fiber which is one of the significant characteristics of an EDFA. Change of behavior of pump and signal intensities along the radius of the fiber in an erbium-doped dual-mode trapezoidal index fiber made amplifier due to Kerr nonlinearity phenomenon originating from launching and transmission of intense light from LASER beam inside the amplifier for the LP_11 mode has been exercised in this case. In the present case, some trapezoidal-index fibers of different normalised frequencies have been opted. This exercise is an implementation of the reliable and easy mathematical instrument, the Chebyshev technique. Results derived in this exercise exhibit a fantastic similarity with those derived by the rigorous finite element method. This study with implementation of such a reliable and easy technique may help the interested optical engineers.

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Tarayana, Andhara Ersa. "SKKL PERFORMANCE ANALYSIS OF SUBMARINE CABLE COMMUNICATION SYSTEM (SKKL) EDFA - SOA AMPLIFIER LINK JAVA – BALI USING OPTISYSTEM." Journal of Telecommunication, Electronics, and Control Engineering (JTECE) 3, no. 1 (2021): 48–53. http://dx.doi.org/10.20895/jtece.v3i1.148.

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The Submarine Cable Communication System (SKKL) is a communication backbone that is deployed under the sea that used to connect networks between islands and between countries. DWDM (Dense Wavelength Division Multiplexing) technology can support long distance communication. Repeater used to reduce the impact of loss, on the detector side the signal can be detected properly. EDFA (Erbium Doped Fiber Amplifier) and Semiconductor Optical Amplifier (SOA) amplifiers can minimize the impact of loss and increasing the gain of each amplifier. The EDFA (Erbium Doped Fiber Amplifier) is an optical amplifier that can work at a wavelength of 1550 nm which provides amplification for the input signal that passes through it which is doped with the element erbium (Er). SOA amplifier is an optical amplifier that utilizes cavity or room cavity to strengthen light. By using branching unit configuration and repeaterless, repeatered, and parallel in-line amplifier configuration and optical system software 7.0 with system reliability parameters such as Q-factor, Bit Error Rate, Power Receiver, and Signal to Noise Ratio with power variations (0 dBm, 2 dBm, 4 dBm, 6 dBm, 8 dBm) at a frequency of 100 GHz for 10 channels. The best result on the Q-Factor parameter is 15,928, the BER parameter is 5.87 x 10-057, the receiver power parameter is -10,319 dBm, and the SNR is 42,713 dB. In this research the best value obtained in the Parallel in-line configuration. So as the best average is in the Repeatered EDFA configuration.

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Lavrinovica, I., A. Supe, and J. Porins. "Experimental Measurement of Erbium-Doped Optical Fibre Charecteristics for Edfa Performance Optimization." Latvian Journal of Physics and Technical Sciences 56, no. 2 (2019): 33–41. http://dx.doi.org/10.2478/lpts-2019-0011.

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Abstract The paper presents experimental study of the major erbium-doped fibre amplifier (EDFA) features such as gain at low signal and gain saturation by an application of different erbium-doped optical fibres (EDFs). The main objective of the research is to estimate how the performance of EDFA varies depending on the length of doped fibre, pumping configuration scheme, as well as excitation source power. It is shown that a high gain coefficient of 16–20 dB can be practically achieved.

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Wang, Peiyuan. "Optimal Design of Fiber Amplifier based on Thulium, YttErbium and Bismuth." Highlights in Science, Engineering and Technology 46 (April 25, 2023): 134–41. http://dx.doi.org/10.54097/hset.v46i.7694.

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Although Erbium-doped fiber amplifier is still the mainstream of optical fiber communication nowadays, it has some limitations. The operation of EDFA is limited to 1530-1610nm, so it is an important research direction to explore different elements. This paper introduces three kinds of fiber amplifiers doped with different rare earth elements: Thulium-doped, YttErbium-doped, and Bismuth-doped fiber amplifiers. The optimal optimization performance is obtained through comparison logic by adjusting various parameters. The maximum gains of three rare-earth-doped fiber amplifiers in different wavelength ranges are obtained: The maximum gain of a Thulium-doped fiber amplifier is 51dB in the wavelength range of 1900nm to 2050nm. The maximum gain of a YttErbium-doped fiber amplifier is 62. 5dB in the wavelength range of 1020nm to 1080nm. The maximum gain of a Bismuth-doped fiber amplifier is 23dB in the wavelength range of 1640nm to 1770nm. These works pave the way for future research.

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Saleh, Reem, and Ibrahim Mohamed. "Optimizing the Erbium-doped Fiber Amplifier (EDFA)'s Length and Location for Improved Free Space Optic (FSO) Range." International Science and Technology Journal 36, no. 1 (2025): 1–12. https://doi.org/10.62341/rsim1905.

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Although free space optical (FSO) communication has a variety of advantages, such as license free, high bandwidth, and high security, its link distance is limited by weather conditions. Incorporating an optical amplifier within the FSO transmission path is one of the most promising methods to mitigate the aforementioned problem. The use of optical amplifiers not only improve signal to noise ratio (SNR), but also increase the link distance of the FSO system. In this paper, the erbium-doped fiber (EDFA)'s length and location were optimized to improve the FSO transmission range. The optimization process was conducted under clear air and light haze conditions using Optisystem. Decisions were taken in the optimization process based on Q-factor. Results confirmed that pre located EDFA with 2m length was the best choice as it gives better Q-factor value. Keywords: Free space optical (FSO), Erbium-Doped Fiber Amplifier (EDFA), FSO link, post arrangement, pre arrangement.

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Huszaník, Tomáš, Ján Turán, and Ľuboš Ovseník. "Realization of a Long-haul Optical Link with Erbium Doped Fiber Amplifier." Carpathian Journal of Electronic and Computer Engineering 11, no. 2 (2018): 44–49. http://dx.doi.org/10.2478/cjece-2018-0018.

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Abstract The need for high capacity and bandwidth in broadband communication systems increased rapidly in a few past years. Optical fiber is now the major transmission medium for fast and reliable communication replacing the old copper-based connections. However, with the deployment of optical networks, number of problems arise. The main problem of optical networks is the amplification in the long-distance transmission. Erbium doped fiber amplifier (EDFA) is the leading technology in the field of optical amplifiers. It uses erbium doped fiber to amplify optical signal. The importance of amplification in optical domain is relevant in long-haul and high-speed transmission systems. In this paper the study of the EDFA is presented. Based on an analytical study, the simulation model of the EDFA is created. The main aim is to determine the optimal parameters of the EDFA for a long-haul 16-channel DWDM (Dense Wavelength Division Multiplexing) system. The performance of the proposed DWDM system is mathematically analyzed using BER (Bit Error Rate) and Q factor.

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K. Abass, A. "Optical Fiber Amplifiers: Optimization and PerformanceEvaluation." DJES 12, no. 1 (2019): 66–72. http://dx.doi.org/10.24237/djes.2019.12108.

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This work demonstrates the simulation of two different types of optical fiber amplifiers (OFA) utilizing OptiSystem–10, namely, 3 m length of erbium doped fiber amplifier (EDFA) and 7 km length of Raman fiber amplifier (RFA). The counter-pumped architecture is adopted for both proposed optical amplifiers. The optimum pump power (OPP) for each amplifier determines in which the longest 3–dB flat gain bandwidth (3–dB BW), reasonable average gain level (Gav), proper average noise figure (NFav) and lower gain variation (Gvar) were achieved. The EDFA shows best performance at conventional band (C–band) within the pump power of 30 mW.While the better performance is observed at long band (L–band) within the pump power of 600 mW for the RFA.

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Ramadani, R., S. A. Khairunisa, and M. Khoiro. "Characteristics Analysis of Hybrid Optical Amplifier with Doped Fiber Variations for Fiber Optic Communications Network." Journal of Physics: Conference Series 2623, no. 1 (2023): 012022. http://dx.doi.org/10.1088/1742-6596/2623/1/012022.

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Abstract Optical communication networks are vital in the digital era, but data transmission becomes weak the longer the distance traveled by light. Erbium-Doped Fiber Amplifier (EDFA) technology is commonly used as an optical amplifier, but it still produces a small gain, Q-factor, and a significant noise figure. This study characterized the Hybrid Optical Amplifier (HOA) combinations that contain EDFA with various doped fibers. The characterization was performed through Optisystem software simulation by observing and analyzing the gain, noise of figure, and Q-factor generated by each doped fiber variant. The results showed that the combination of Ytterbium-doped Fiber produced the most significant gain of 15.83 dB, less noise figure of 5,661 dB, and a relatively high Q-factor of 35,615 at 1,550 nm. It indicates that the HOA combination is suitable and ideal for long-distance transmission in fiber optic communication network applications.

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Joel, Nikita M., and Brintha Therese A. "ANALYSING THE PERFORMANCE OF EDFA AND APD RECEIVER IN DYNAMIC WDN NETWORK." Asian Journal of Pharmaceutical and Clinical Research 10, no. 13 (2017): 194. http://dx.doi.org/10.22159/ajpcr.2017.v10s1.19635.

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This paper demonstrates the performance of Erbium doped fiber amplifier(EDFA) and APD receiver in a dynamic wavelength division multiplexing(WDM) system. A four channel 10Gb/s system is taken into consideration and the performance of Erbium doped fiber Amplifier is assessed. The experimental setup consists of a transmitter, a receiver and two intermediate nodes. The transmitted system is tested for Bit Error Rate (BER) and Eye pattern at the receiver. The spectrum is also analysed for different length of fiber. Add Drop Experiment was carried on in which a laser source was switched on and off continuously to assess the transient response of WDM system. Then the Eye Pattern is analysed in which Erbium doped fiber Amplifier system will provide a clear open eye with no degradation of signal.

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Mallick, Bandana, Bibhu Prasad, and Dr Krishna Chandra Patra. "Design of a Hybrid Optical amplifier for 64 DWDM Channels network by using EDFA and Raman Amplifier." International Journal of Electrical and Electronics Research 5, no. 4 (2017): 18–23. http://dx.doi.org/10.37391/ijeer.050401.

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In this paper a hybrid amplifier EDFA-RAMAN DWDM transmission system is proposed and demonstrated. A new hybrid two-stage optical fiber amplifier for dense wavelength division multiplexing (DWDM) network is observed. The hybrid amplifier is cascaded erbium- doped fiber amplifiers (EDFA) & Raman amplifier which provide a nearly flat gain over 80 nm. The hybrid amplifier has been modeled using an Optic-System version 14 on a DWDM transmission. In this paper we compare Q-factor at different input power i.e. at 0db and at 10 db. Here two different types of apodized function (Uniform & Gaussian) are selected as fiber Bragg grating parameters and system performance is analyzed. Performance of the system is analyzed by using BER analyzer.

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Naser, Nour A., Muhammed R. Harb, and Hassan A. Yasser. ""Analytical Model of Pulse Amplification in Erbium Doped Fiber Amplifier "." Muthanna Journal of Pure Science 7, no. 2 (2020): 39–48. http://dx.doi.org/10.52113/2/07.02.2020/38-48.

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"Doping a part of the optical fiber core by (Er3+ ) ions in presence of external pumping power will lead to form the erbium-doped fiber amplifier (EDFA).The performance of this optical amplifier depends on (the power and the wavelength of the pumping laser, the power and wavelength of the input signal, amplifier length, ion concentration). These parameters will affect the characteristics of EDFA such as amplifier gain, gain saturation, noise figure and output power. However, these characteristics can be determined by solving the EDFA propagation and rate equations. The solution of these equations of two-level laser medium can be done numerically. In this paper, we are proposed a novel method to solve these equations. The reconstructed results are perfectly coincided the well known numerical results.

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S, Semmalar, and Malarkkan S. "PERFORMANCE OPTIMIZATION OF INLINE EDFA-EYCDFA FOR MULTIPLE WAVELENGTH SERVICES IN OPTICAL COMMUNICATION SYSTEMS USING QUAD-SINGLE FORWARD AND TRI BACKWARD PUMPING TECHNIQUE." ICTACT Journal on Microelectronics 7, no. 1 (2021): 1074–79. https://doi.org/10.21917/ijme.2021.0187.

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Proposed the inline EDFA-EYCDFA (Erbium Doped Fiber Amplifier- Erbium ytterbium co doped fiber amplifier) with Quad Pumping for multi wavelength services in optical communication systems using WDM technology. The proposed inline EDFA-EYCDFA model simulated by dual forward and backward pumping, dual-backward pumping, Tri-single forward and dual backward pumping and Quad-single forward and tri-backward pumping with respect to Pump power and fiber Length. The parameters Input optical power, output optical power, Gain, Noise figure, Forward noise power and backward noise power measured from all the types of pumping techniques from that the proposed inline EDFA-EYCDFA with Quad pumping gives high strength gain output with less forward noise power and backward noise power. Quad pumping is the best model suitable for multiple wavelength services in optical communication. The Results shown in Quad pumping Gain is maximum 28 dB and Forward Noise power is less -42.9dBm with the pump power of 20dB and fiber Length 5m.

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Liu, Hong, and Wei Da Zhan. "Research on High-Power, High-Speed Laser Modulation and Enlarge Experiment." Applied Mechanics and Materials 721 (December 2014): 579–82. http://dx.doi.org/10.4028/www.scientific.net/amm.721.579.

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A laser modulation and amplification system is designed to meet the demand of long-range space optical communication, which uses the high-speed semiconductor laser to integrate electro-absorption (EA) modulator as a seed source. Two optical fiber amplifier technologies are used. The erbium-doped fiber amplifier (EDFA) and single-mode semiconductor laser pumping are used in the first-level; erbium ytterbium co-doped fiber amplifier (EYDFA) and 2-4 multimode fiber laser pumping with good temperature characteristics are used in the second level, and the control method is automatic gain control. The experimental result shows that the modulation rate achieves to 10Gbps, and the output optical power achieves to 5W.

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Róka, Rastislav. "Simulation of the optical erbium doped fiber amplification for performance analysis." Journal of Electrical Engineering 72, no. 3 (2021): 168–75. http://dx.doi.org/10.2478/jee-2021-0023.

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Abstract In this contribution, innovations in the simulation of the optical transmission path are presented specifically, the dynamic performance analysis of erbium doped fiber amplifier (EDFA) properties for system applications is focused. Our EDFA simulation model is based on population equations of ions that can describe mutual relations between three states of ions in the EDFA amplifier. The presented numerical approach includes a signal gain and noise contributions to the single input channel amplification using the steady state modelling coming out of a dynamic model. The EDFA model in the steady state can be consequently applied for a purpose of advanced si mulations performed in the complete optical transmission path.

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Liu, Lian Lian, Tao Shen, Suai Meng, Han Yu Yang, Ping Yu Nie, and Xin Zhang. "The Analysis of Institutional Factors for Gain of EDFA." Advanced Materials Research 981 (July 2014): 54–57. http://dx.doi.org/10.4028/www.scientific.net/amr.981.54.

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Small signal gain of fiber amplifier has been measurement using a small signal broadband light source of simple and more accurate. And through the numerical simulation for test condition and experimental results of this method are discussed. The factors influencing of the erbium-doped fiber amplifier gain has been simulation and analysis, and effect of fiber length on the gain of the test. A new method is proposed for measuring optical fiber amplifier gain spectrum.

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Lao, Haoxian, Jiyu Ruan, Manbing Lin, et al. "Dual-Stage Double-Pass Extended L-Band Erbium-Doped Fiber Amplifier with Improved Gain Performance." Photonics 10, no. 11 (2023): 1266. http://dx.doi.org/10.3390/photonics10111266.

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Extended L-band erbium-doped fiber amplifiers (EDFAs) have attracted much attention in recent years despite their relatively low gain levels. In this paper, a dual-stage extended L-band EDFA with improved gain level is demonstrated by using an Er/Yb/P co-doped fiber-based double-pass structure assisted by a low noise pre-amplifier. High gain levels of up to 48.79 dB at 1566 nm and 20.05 dB at 1621.4 nm are achieved with saturated output power at 1605 nm of 20.58 dBm under a total pump power of only 400 mW. Bandwidths with the gain of more than 20 and 30 dB are reached up to 66 nm (1555.4–1621.4 nm) and 58.4 nm (1557.5–1615.9 nm), respectively. The noise figure benefited by using the low noise pre-amplifier is 5.40 ± 1.55 dB in the 1565–1610 nm range. The wide gain bandwidth, high gain level and relatively low pump power give it great potential for future high-capacity optical fiber communication systems.

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Ismail, Khadijah, P. S. Menon, Sahbudin Shaari, Abang Annuar Ehsan, Norhana Arsad, and A. Ashrif A. Bakar. "Link Power Level Improvements in an Amplified 8-Channel CWDM System with Hybrid EDFA-SOA Pre-Amplifier." Applied Mechanics and Materials 799-800 (October 2015): 1361–65. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.1361.

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The link power improvement in a coarse wavelength division multiplexing (CWDM) system which is transmitted using a hybrid erbium-doped fiber amplifier (EDFA) and semiconductor optical amplifier (SOA) scheme as a pre-amplifier, is discussed. The network is designed for amplifying 8 CWDM channels ranging from 1471 nm to 1611 nm. The hybrid amplifiers’ gain measurement is obtained from experimental work with gain peak at 22 dB which is observed at 1531 nm. The amplifiers also caused power increment of 5.06 dB in the transmission link before the signal is split individually at the receiving end. Based on the higher gain peaks and power spectrum at 1531 nm and 1551 nm wavelengths, the proposed amplified link would be useful for the transmission of video applications.

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HARUN, S. W., and H. AHMAD. "L-BAND EDFA WITH INJECTION OF C-BAND ASE." Journal of Nonlinear Optical Physics & Materials 13, no. 02 (2004): 315–19. http://dx.doi.org/10.1142/s0218863504001888.

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The effect of injecting of C-band amplified spontaneous emission (ASE) from C-band erbium-doped fiber amplifier (EDFA) on the performance of L-band EDFA is demonstrated using a circulator and broadband fiber Bragg grating (FBG). Injecting a large amount of ASE (VOA=0 dB) clamps the gain at 15.2 dB from -40 to -10 dBm with a gain variation of less than 0.3 dB. Injecting a small amount of ASE (attenuation of 20 dB and above) improves the small signal gain with a negligible noise figure penalty compared to that of an amplifier without the ASE injection. A maximum gain improvement of 3.5 dB is obtained at an attenuation of 20 dB. These results show that the ASE injection technique can be used either for gain improvement or gain clamping in L-band EDFA.

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Liu, Li Ying, Yu Ma, and Jiu Ru Yang. "Parameters Optimization of Er³⁺ Doped Fiber Amplifier by Numerical Simulation." Advanced Materials Research 694-697 (May 2013): 1450–53. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.1450.

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The erbium doped fiber amplifier (EDFA) is one of the most important devices in the present optical communication and measurement system. However, the problem on parameters optimization of EDFA is always an open issue. Aim to obtain the output characteristics quickly and flexibly, in this article, we model the operation of an EDFA system by simulation. The numerical results show that the output spectrum of EDFA with various parameters. And through analyzing the performance in terms of gain, flatness and noise, the optimal pumping power and the length of EDF are determinate.

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Ibrahim, Siti Azlida, Amilia Mansoor, Tuan Ainin Sofea Tuan Mohd Marzuki, Nasr Y. M. Omar, and Hairul Azhar Abdul Rashid. "Comparison of 1480 nm and 980 nm-pumped Gallium-Erbium fiber amplifier." F1000Research 10 (March 29, 2021): 251. http://dx.doi.org/10.12688/f1000research.50952.1.

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Background: One way to reduce the length of the gain medium in Erbium-Doped Fiber Amplifier (EDFA) is by doping the fiber core with a high concentration of Erbium. However, this method caused ion clustering effects, which limits the EDFA’s efficiency. In this research, the use of Gallium as a new co-dopant in erbium-doped silica fiber is explored. Methods: The new fiber, namely Gallium co-doped Erbium fiber (Ga-EDF), is used as a gain medium in an optical fiber amplifier setup. A 2-meter length of the Ga-EDF fiber was used in a single pass configuration with a forward pumping scheme at 150 mW pump power. The Ga-EDF amplifier's gain and noise figure while pumping at 980 nm and 1480 nm were compared. The amplifier's performance was evaluated as the input signal power varied between -30 dBm to 3 dB, over the wavelength range of 1520 nm to 1580 nm. Results: The 980 nm-pumped Ga-EDF amplifier achieved the maximum small-signal gain of 22.45 dB and the corresponding noise figure of 5.71 dB at the input signal wavelength of 1535 nm. Meanwhile, the 1480 nm-pumped Ga-EDF amplifier attained the maximum small-signal gain of 20.83 dB and the corresponding noise figure of 5.09 dB at the input signal wavelength of 1550 nm. At the input signal power below -20 dBm and the wavelength range 1520 nm to 1547 nm, the Ga-EDF performs better when pumped at 980 nm. Their performance is comparable at the input signal wavelength range between 1547 nm to 1580 nm. At the input signal power above -20 dBm, the 1480 nm-pumped Ga-EDF outperformed the 980 nm-pumped amplifier. Conclusions: The overall performance indicates that the gain saturation point of the 1480 nm-pumped amplifier is higher than the 980 nm-pumped.

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Ibrahim, Siti Azlida, Amilia Mansoor, Tuan Ainin Sofea Tuan Mohd Marzuki, Nasr Y. M. Omar, and Hairul Azhar Abdul Rashid. "Comparison of 1480 nm and 980 nm-pumped Gallium-Erbium fiber amplifier." F1000Research 10 (September 8, 2021): 251. http://dx.doi.org/10.12688/f1000research.50952.2.

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Background: One way to reduce the length of the gain medium in Erbium-Doped Fiber Amplifier (EDFA) is by doping the fiber core with a high concentration of Erbium. However, this method caused ion clustering effects, which limits the EDFA’s efficiency. In this research, the use of Gallium as a new co-dopant in erbium-doped silica fiber is explored. Methods: The new fiber, namely Gallium co-doped Erbium fiber (Ga-EDF), is used as a gain medium in an optical fiber amplifier setup. A 2-meter length of the Ga-EDF fiber was used in a single pass configuration with a forward pumping scheme at 150 mW pump power. The Ga-EDF amplifier's gain and noise figure while pumping at 980 nm and 1480 nm were compared. The amplifier's performance was evaluated as the input signal power varied between -30 dBm to 3 dBm, over the wavelength range of 1520 nm to 1580 nm. Results: The 980 nm-pumped Ga-EDF amplifier achieved the maximum small-signal gain of 22.45 dB and the corresponding noise figure of 5.71 dB at the input signal wavelength of 1535 nm. Meanwhile, the 1480 nm-pumped Ga-EDF amplifier attained the maximum small-signal gain of 20.83 dB and the corresponding noise figure of 5.09 dB at the input signal wavelength of 1550 nm. At the input signal power below -20 dBm and the wavelength range 1520 nm to 1547 nm, the Ga-EDF performs better when pumped at 980 nm. Their performance is comparable at the input signal wavelength range between 1547 nm to 1580 nm. At the input signal power above -20 dBm, the 1480 nm-pumped Ga-EDF outperformed the 980 nm-pumped amplifier. Conclusions: The overall performance indicates that the gain saturation point of the 1480 nm-pumped amplifier is higher than the 980 nm-pumped.

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Alaruri, Sami D. "Single Stage C-Band Erbium-Doped Fiber Amplifier (EDFA) Development and Performance Evaluation." International Journal of Measurement Technologies and Instrumentation Engineering 7, no. 2 (2018): 41–49. http://dx.doi.org/10.4018/ijmtie.2018070103.

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In this work, a single-stage C-band erbium-doped fiber amplifier (EDFA) has been constructed and characterized. Gain (G) and noise figure (NF) measurements collected for the C-band EDFA as a function of wavelength (1528.8 to 1562.3 nm) and laser pump powers are discussed. Further, the EDFA conversion efficiency (CE) as a function of laser pump powers is presented. Simplified mathematical expressions for the EDFA gain, NF, and CE are provided. The C-band EDFA signal gain remained flat in the spectral region 1539 to 1562 nm. Moreover, the C-band EDFA NF increased with wavelength and decreased with the 1480 nm laser pump powers. Additionally, the C-band EDFA maximum achieved conversion efficiency and signal gain is 22.64% at P1=19.49 mW and 22.6 dB at 1531.1 nm, respectively.

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Singh, Rishabh, Ghanendra Kumar, and Chakresh Kumar. "Impact of encryption and decryption techniques for high speed optical domain." Computer Science and Information Technologies 2, no. 1 (2021): 11–15. http://dx.doi.org/10.11591/csit.v2i1.p11-15.

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This project proposes the design of ultrafast communication circuit which can enable the high speed secured data transmission at 50 Gb/s and 100 Gb/s by the use of distributed Raman amplifier, EDFA (Erbium – doped fiber amplifier), filter, single mode fiber along with Fiber Bragg Grating (FBG) and attenuators. The simulation of the suggested optical circuit involves the use of parameters of Raman amplifier and EDFA and other components included in the optical structure. The design also includes the use of encryption and decryption techniques to ensure secured communication. Thus, realization of these circuits at 50 Gb/s and 100 Gb/s will enable the future optical communication applications for ultrafast data transmission to large distances.

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Rishabh Singh, Ghanendra Kumar, and Chakresh Kumar. "Impact of encryption and decryption techniques for high speed optical domain." Computer Science and Information Technologies 2, no. 1 (2021): 11–15. http://dx.doi.org/10.11591/csit.v2i1.pp11-15.

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This project proposes the design of ultrafast communication circuit which can enable the high speed secured data transmission at 50 Gb/s and 100 Gb/s by the use of distributed raman amplifier, erbium–doped fiber amplifier (EDFA), filter, single mode fiber along with fiber Bragg grating (FBG) and attenuators. The simulation of the suggested optical circuit involves the use of parameters of Raman amplifier and EDFA and other components included in the optical structure. The design also includes the use of encryption and decryption techniques to ensure secured communication. Thus, realization of these circuits at 50 Gb/s and 100 Gb/s will enable the future optical communication applications for ultrafast data transmission to large distances.

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Rishabh, Singh, Kumar Ghanendra, and Kumar Chakresh. "Impact of encryption and decryption techniques for high speed optical domain." Computer Science and Information Technologies 2, no. 1 (2020): 11–15. https://doi.org/10.11591/csit.v2i1.p11-15.

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This project proposes the design of ultrafast communication circuit which can enable the high speed secured data transmission at 50 Gb/s and 100 Gb/s by the use of distributed Raman amplifier, Erbium–doped fiber amplifier (EDFA), filter, single mode fiber along with fiber Bragg grating (FBG) and attenuators. The simulation of the suggested optical circuit involves the use of parameters of Raman amplifier and EDFA and other components included in the optical structure. The design also includes the use of encryption and decryption techniques to ensure secured communication. Thus, realization of these circuits at 50 Gb/s and 100 Gb/s will enable the future optical communication applications for ultrafast data transmission to large distances.

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Facchini, Alberto, Adriana Morana, Luciano Mescia, et al. "Experimental–Simulation Analysis of a Radiation Tolerant Erbium-Doped Fiber Amplifier for Space Applications." Applied Sciences 13, no. 20 (2023): 11589. http://dx.doi.org/10.3390/app132011589.

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Research on optical amplifiers has highlighted how ionizing radiation negatively impacts the performance of erbium-doped fiber amplifiers (EDFAs), through the degradation of their gain. The amplitudes and kinetics of this degradation are mainly explained by the radiation-induced attenuation (RIA) phenomenon at the pump and signal wavelengths. In this work, the gain degradation of a radiation tolerant EDFA (exploiting a cerium-co-doped active optical fiber) induced by ionizing radiation up to 3 kGy (SiO2), at two dose rates, 0.28 Gy/s and 0.093 Gy/s, is studied through an experimental/simulation approach. Using a home-made simulation code based on the rate and power propagation equations and including the RIA effects, the radiation-dependent performance of EDFAs were estimated. The variations in the spectroscopic parameters caused by irradiation were also characterized, but our results show that they give rise to EDFA gain degradation of about 1%. To overcome the issue of overestimating the RIA during the radiation tests on the sole active rare-earth-doped fiber, a new RIA experimental setup is introduced allowing us to better consider the photobleaching mechanisms related to the pumping at 980 nm. A good agreement between experimental and simulated gain degradation dose dependences was obtained for two different irradiation conditions, thus also validating the simulation code for harsh environments applications.

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S. Zynal, Baedaa, Alaa Thaer Lateef, Sabah Abdulazeez Jebur, and Hayder Naser. "Improving Communication Performance Through Fiber Amplifier EDFA." AlKadhim Journal for Computer Science 2, no. 2 (2024): 1–9. http://dx.doi.org/10.61710/kjcs.v2i2.75.

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Due to the development of fast and extensive data communication methods, typical erbium-doped fiber amplifiers (EDFA) have recently gained much interest. The main advantage of EDFA is its ability to build a system with a broad band. However, it is evident from documented works that using EDFA results in a gain increase. Nevertheless, the expense, complexity, and subpar effectiveness of these procedures made them ineffective. In this work, the performance of an 8-channel communication system for different distances of 80, 120, and 180 km is enhanced and maximized by applying a simulation model of long distance based on EDFA to reduce the effects of dispersion correction. The effect of the EDFA on three channels was investigated along the three distances by Q Factor and BER. The proposed system achieved good results in enhancing signals due to EDFA. The results of the extraction demonstrate the system's capacity to send large data rates to 180 km with a bit error rate of less than 1×10-14. EDFA shows the best performance in gain differences. The simulation setup and implementation of the work aim to improve communication performance and propose a suitable solution to enhance the Bit Error Rate (BER).

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Malik, Deepak, Geeta Kaushik, and Amit Wason. "Performance Evaluation of Optical Amplifiers for High-Speed Optical Networks." Journal of Optical Communications 41, no. 1 (2019): 15–21. http://dx.doi.org/10.1515/joc-2017-0133.

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Abstract Optical networks were invented by the developing and developed nations in order to extend the capacity required for communication systems in a worthwhile way. In this paper, the attempt is done to improve the capacity and performance of semiconductor optical amplifier, Raman and erbium-doped fiber amplifier (EDFA) amplifiers used in optical networks. The potential of different optical amplifiers operating at 8×10 Gbps has been examined and their performance was compared on behalf of different parameters, viz. eye opening, eye closure, jitter, quality factor and transmission distances. It was observed that EDFA provided the consistent good quality of communication for long-distance transmission up to 150 km along with better eye opening and eye closure with acceptable jitter performance. Further, it is observed on the basis of quality factor and bit error rate that EDFA gives comparably better performance than Raman amplifier. Moreover, it is seen that as the data rate of the system increases, the quality of communication signals starts decreasing.

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Ma, Jing, Qing Feng Liu, and Li Ying Tan. "Experimental Investigation of Neutron Irradiation Effect on Silica-Based Erbium-Doped Fiber Amplifier." Advanced Materials Research 679 (April 2013): 59–62. http://dx.doi.org/10.4028/www.scientific.net/amr.679.59.

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This paper studied the influence of neutron irradiation on the characteristics of 980nm pumped erbium-doped fiber amplifier(EDFA). After 7 days neutron irradiation, with the total fluence of 1.5×1013n/cm2, radiation induced loss changed little compared with pre-irradiation, maximum difference of single signal and WDM signal between pre-irradiation and post- irradiation are 0.5dB and 0.6dB, respectively. EDFA affected by neutron irradiation got less loss when the input signal power is higher.

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Kaur, Dalveer, and Vikrant Sharma. "Investigation of Power Transients in 45 Channel DWDM Ring Optical Network." Circulation in Computer Science 1, no. 1 (2016): 36–39. http://dx.doi.org/10.22632/ccs-2016-251-22.

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Erbium doped fiber amplifiers (EDFA) are most commonly used in optical networks for the most assorted applications. The fast power transient effect of the cascaded erbium-doped fiber amplifiers (EDFA) in 45 channels optical ring network is investigated. The power transient effect of EDFA’s are observed when channels are added and dropped. It is shown that, for low channel adding/dropping frequency closed to EDFA transient rate, the transmission performances of the surviving channels are impaired severely. And also ring laser configuration technique has been reported to mitigate the effect of power transients. Optsim simulation was utilized for simulation of the designed DWDM OADM ring network.

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Hu, Kaihua, Li Pei, Jianshuai Wang, et al. "L-Band Erbium-Doped Fiber Optimization and Transmission Investigation." Photonics 12, no. 5 (2025): 480. https://doi.org/10.3390/photonics12050480.

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The optical spectrum resource in the C-band has been used up due to dense wavelength division multiplexing (DWDM). Because of devices’ compatibility with both the C-band and the L-band, the L-band is a good choice for further capacity expansion. Meanwhile, the mode division multiplexing (MDM) method has been applied to increase the number of channels. However, the few-mode erbium-doped fiber amplifier must be redesigned to overcome the power differences among channels. In this work, a few-mode erbium-doped fiber (FM-EDF) is optimized and manufactured. Then, an in-line gain-equalized L-band FM-EDFA is constructed. The experimental results show that the FM-EDFA works well in the wavelength range between 1575 nm and 1610 nm. The minimum differential modal gain (DMG) is 0.54 dB, and the maximum modal gain is 22.22 dB. Due to the excellent performance of the L-band FM-EDFA, a DSP-free transmission scheme in the L-band is demonstrated. The bit error rates (BERs) of each channel are below 1 × 10−5 with a DSP-free receiver.

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Zhang, Hu, Di Han, Lixia Xi, et al. "Two-Layer Erbium-Doped Air-Core Circular Photonic Crystal Fiber Amplifier for Orbital Angular Momentum Mode Division Multiplexing System." Crystals 9, no. 3 (2019): 156. http://dx.doi.org/10.3390/cryst9030156.

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Orbital angular momentum (OAM) mode-division multiplexing (MDM) has recently been under intense investigations as a new way to increase the capacity of fiber communication. In this paper, a two-layer Erbium-doped fiber amplifier (EDFA) for an OAM multiplexing system is proposed. The amplifier is based on the circular photonic crystal fiber (C-PCF), which can maintain a stable transmission for 14 OAM modes by a large index difference between the fiber core and the cladding. Further, the two-layer doped region can balance the amplification performance of different modes. The relationship between the performance and the parameters of the amplifier is analyzed numerically to optimize the amplifier design. The optimized amplifier can amplify 18 modes (14 OAM modes) simultaneously over the C-band with a differential mode gain (DMG) lower than 0.1 dB while keeping the modal gain over 23 dB and noise figure below 4 dB. Finally, the fabrication tolerance and feasibility are discussed. The result shows a relatively large fabrication tolerance in the OAM EDFA parameters.

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D’Ingillo, Rocco, Alberto Castronovo, Stefano Straullu, and Vittorio Curri. "Polynomial Modeling of Noise Figure in Erbium-Doped Fiber Amplifiers." Fibers 13, no. 3 (2025): 34. https://doi.org/10.3390/fib13030034.

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Erbium-Doped Fiber Amplifiers (EDFAs) are fundamental to optical communication networks, providing signal amplification while introducing noise that affects system performance. Accurate noise figure estimation is critical for optimizing link budgets, monitoring optical Signal-to-Noise Ratio (OSNR), and enabling real-time network optimization. Traditional analytical models, while computationally efficient, often fail to capture device-specific variations, whereas machine-learning-based approaches require large training datasets and introduce high computational overhead. This paper proposes a polynomial regression model for real-time EDFA noise figure estimation, striking a balance between accuracy and computational efficiency. The model leverages Generalized Least Squares (GLS) regression to fit a multivariate polynomial function to measured EDFA noise figure data, ensuring robustness against measurement noise and dataset variations. The proposed method is benchmarked against experimental measurements from multiple EDFAs, achieving prediction errors that are within the measurement uncertainty of Optical Spectrum Analyzers (OSAs). Furthermore, the model demonstrates strong generalization across different EDFA architectures, outperforming analytical models while requiring significantly less data than deep-learning approaches. Computational efficiency is also analyzed, showing that inference time is below 0.2 ms per evaluation, making the model suitable for real-time digital-twin applications in optical networks. Future work will explore hybrid modeling approaches, integrating physics-based regression with Machine Learning (ML) to enhance performance in high-variance spectral regions. These results highlight the potential of lightweight polynomial regression models as an alternative to complex ML-based solutions, enabling scalable and efficient EDFA performance prediction for next-generation optical networks.

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Sarı, Talha, and Fırat Ertaç Durak. "Analyzing the Impact of EDFA Positioning on Signal Quality in DWDM." Afyon Kocatepe University Journal of Sciences and Engineering 25, no. 2 (2025): 354–58. https://doi.org/10.35414/akufemubid.1569525.

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The positioning of Erbium-Doped Fiber Amplifiers (EDFAs) plays a crucial role in optimizing the performance of Dense Wavelength Division Multiplexing (DWDM) systems, particularly in addressing signal attenuation challenges in long-distance optical transmission. This study investigates the impact of EDFA placement configurations (booster, in-line, and pre-amplifier) on signal quality using OptiSystem software simulations. The research examines systems with 4 to 16 DWDM channels, operating at 10 Gbit/s per channel with 50 GHz spacing, varying total input power between -10 dBm to 5 dBm. Results demonstrate that the booster amplifier configuration performs best, while the pre-amplifier setup exhibits more pronounced degradation. The in-line amplifier configuration shows a balanced performance, effectively restoring signal strength while requiring less pump power than the booster configuration, making it a viable option for optimizing energy efficiency in DWDM systems. A critical performance threshold was identified between 10-12 channels, where all configurations experience significant changes in error performance.

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BAO, PHUNG QUOC, and LE HONG SON. "GAIN AND NOISE IN ERBIUM-DOPED FIBER AMPLIFIER (EDFA) - A RATE EQUATION APPROACH (REA)." Communications in Physics 14, no. 1 (2007): 1. http://dx.doi.org/10.15625/0868-3166/12.

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We present a rate equation approach (REA) based on the propagation equations in single-mode Erbium-Doped Fiber Amplifiers (EDFAs). Special attention is paid to the gain and the amplified spontaneous emission (ASE) noise as functions of position including the effects of some main parameters such as pump power, signal power.

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Ajiya, M., J. A. Oladapo, and N. A. M. Ahmad Hambali. "Lasing threshold characteristics of multi-wavelength Brillouin–erbium laser in the L-band region assisted by delay interferometer." Journal of Nonlinear Optical Physics & Materials 25, no. 02 (2016): 1650024. http://dx.doi.org/10.1142/s0218863516500247.

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This paper reports the simulation of L-band multi-wavelength Brillouin–erbium fiber laser that utilizes delay interferometer as a comb filter. The simulation is performed using OptiSystem. The structure exhibits threshold power in terms of Erbium doped fiber amplifier (EDFA) gain of 10[Formula: see text]mW at a very low Brillouin pump power of 0.00316[Formula: see text]mW for the generation of first Stokes. Thirty one output channels were produced with minimum EDFA gain of 1[Formula: see text]W at Brillouin pump power of 0.00316[Formula: see text]mW. In line with theory, it has been observed that higher Brillouin pump power requires low threshold gain and vice versa to generate the Brillouin Stokes.

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Naufal, Sabiqun, Misriana Misriana, and Hanafi Hanafi. "Analisis Kinerja Jaringan Radio over Fiber (RoF) menggunakan Optical Amplifier." Jurnal Litek : Jurnal Listrik Telekomunikasi Elektronika 21, no. 2 (2024): 69–73. https://doi.org/10.30811/litek.v21i2.39.

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Perkembangan teknologi telekomunikasi menuntut peningkatan kecepatan dan keandalan pertukaran data. Meskipun sistem transmisi kabel memiliki kecepatan tinggi dan performa prima, namun biaya instalasi yang dibutuhkan cukup besar. Sebagai solusi, Radio over Fiber (RoF) dihadirkan untuk mengintegrasikan jaringan nirkabel dan kabel. Pilihan penguat optik, seperti Erbium Doped Fiber Amplifier (EDFA), dan modulator RF QAM yang tepat dapat meningkatkan kinerja transmisi Radio over Fiber. Penelitian ini bertujuan merancang dan membuat sistem RoF yang disimulasikan menggunakan software Optisystem. Sistem menggunakan modulasi 4-QAM, yang dijalankan dengan menggunakan EDFA dan tanpa EDFA. Parameter yang dianalisis adalah Q-factor, OSNR, dan BER. Hasil penelitian menunjukkan bahwa sistem dengan menggunakan EDFA, pada jarak 85 km diperoleh nilai Q-factor sebesar 6,1427, OSNR 23,20993, dan nilai BER 4,05625 ´ 10−10. Sedangkan pada skema pengujian jarak 90 km s/d jarak 200 km, kondisi transmisi tidak memenuhi standar kelayakan yang ditetapkan. Hal ini disebabkan oleh panjang link yang dilewati semakin jauh dan menimbulkan dispersi loss yang semakin besar.

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Qu, Boen. "Gain optimization and data modeling of S-band of Tm-doped fiber amplifier based on genetic algorithm." Journal of Physics: Conference Series 2649, no. 1 (2023): 012023. http://dx.doi.org/10.1088/1742-6596/2649/1/012023.

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Abstract At present, fiber amplifiers are indispensable in the field of communication, Erbium-doped fiber amplifiers (EDFA) are currently more mature fiber amplifiers, but because of electronic bottlenecks, they have approached saturation in recent years. Thus, the study and application of fiber amplifiers doped with other rare earth elements has become a new goal at present. At the same time, expanding the available bandwidth of the fiber amplifier to a higher or lower direction has also become a major task. This article discusses the gain of thulium-doped fiber amplifiers at 1400 nm – 1450 nm (S-band) and uses the genetic algorithm to optimize the fiber length and doping concentration to find the optimal solution, this article also analyzes the change in gain at different fiber lengths and doping concentrations. The results show that the fiber length is 56.2705 meters, and the doping concentration is 59.9502 ×1024 per square meter, at which the gain reaches the peak is 65.19. The results show that the thulium-doped fiber amplifier (TDFA) in this band has good amplification characteristics, and it can be meticulously studied based on this method in the future to obtain more accurate results. It can also be solved using other algorithms, such as Quantum Genetic Algorithms.

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BAO, PHUNG QUOC, and LE HONG SON. "GAIN AND NOISE IN ERBIUM-DOPED FIBER AMPLIFIER (EDFA) - A RATE EQUATION APPROACH (REA)." Communications in Physics 14, no. 1 (2007): 1. http://dx.doi.org/10.15625/0868-3166/14/1/12.

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We present a rate equation approach (REA) based on the propagation equations in single-mode Erbium-Doped Fiber Amplifiers (EDFAs). Special attention is paid to the gain and the amplified spontaneous emission (ASE) noise as functions of position including the effects of some main parameters such as pump power, signal power.

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44

BAO, PHUNG QUOC, and LE HONG SON. "GAIN AND NOISE IN ERBIUM-DOPED FIBER AMPLIFIER (EDFA) - A RATE EQUATION APPROACH (REA)." Communications in Physics 14, no. 1 (2024): 1–6. http://dx.doi.org/10.15625/0868-3166/213.

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We present a rate equation approach (REA) based on the propagation equations in single-mode Erbium-Doped Fiber Amplifiers (EDFAs). Special attention is paid to the gain and the amplified spontaneous emission (ASE) noise as functions of position including the effects of some main parameters such as pump power, signal power.

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45

Liu, Yaping, Zhiqun Yang, Xutao Wang, Yongmin Jung, and Lin Zhang. "Gain Equalization for Few-Mode Erbium-Doped Fiber Amplifiers via Strong Mode Coupling." Applied Sciences 12, no. 2 (2022): 767. http://dx.doi.org/10.3390/app12020767.

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Few-mode erbium-doped fiber amplifiers (FM-EDFAs) are one of the most important optical subsystems for successful space division multiplexed transmission systems. In this paper, we propose a new FM-EDFA designed to achieve significantly reduced differential modal gain (DMG) via strong mode coupling. Using a new numerical model based on a fiber transfer matrix, the DMGs of FM-EDFAs are systematically investigated and two different types of six-mode fiber amplifiers are analyzed, as exemplar demonstrations. In a uniformly doped step-index fiber, the DMG can be reduced from 9.3 to 1.1 dB (i.e., 8.2 dB reduction) and further reduced to 0.5 dB in a dual-layer doping structure.

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46

Tran, Duc-Tan, and Ninh Trung Bui. "Improvements on the performance of subcarrier multiplexing/wavelength division multiplexing based radio over fiber system." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (2021): 1439. http://dx.doi.org/10.11591/ijece.v11i2.pp1439-1449.

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Radio over fiber (RoF) techniques are good candidates to create the backbone of the next generation of wireless networks. Many parameters affect RoF communications such as amplified spontaneous emission noise (ASE), four-wave mixing nonlinearity (FWM), the modulation, channel spacing, switching voltage, and phase shifter. In this paper, we propose an improved model of RoF communication systems using subcarrier multiplexing/wavelength division multiplexing (SCM/WDM) technique with unequal channel spacing and 1-km Erbium-doped fiber amplifier (EDFA). Simulation results confirmed that we could obtain the lowest bit error rate and noises when the EDFA is placed at 1 km from the transmitter by using optical single-sideband (OSSB) modulation at frequencies 193.1 THz, 193.2 THz, 193.35 THz, and 193.6 THz.

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Duc-Tan, Tran, and Trung Bui Ninh. "Improvements on the performance of subcarrier multiplexing/wavelength division multiplexing based radio over fiber system." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (2021): 1439–49. https://doi.org/10.11591/ijece.v11i2.pp1439-1449.

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Radio over fiber (RoF) techniques are good candidates to create the backbone of the next generation of wireless networks. Many parameters affect RoF communications such as amplified spontaneous emission noise (ASE), four-wave mixing nonlinearity (FWM), the modulation, channel spacing, switching voltage, and phase shifter. In this paper, we propose an improved model of RoF communication systems using subcarrier multiplexing/wavelength division multiplexing (SCM/WDM) technique with unequal channel spacing and 1-km Erbium-doped fiber amplifier (EDFA). Simulation results confirmed that we could obtain the lowest bit error rate and noises when the EDFA is placed at 1 km from the transmitter by using optical single-sideband (OSSB) modulation at frequencies 193.1 THz, 193.2 THz, 193.35 THz, and 193.6 THz.

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Awang Lah, Airull Azizi, Abdul Hadi Sulaiman, Fairuz Abdullah, et al. "Stable Triple-Wavelength Random Fiber Laser Based on Fiber Bragg Gratings." Photonics 10, no. 8 (2023): 924. http://dx.doi.org/10.3390/photonics10080924.

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We demonstrate a generation of three lasing wavelengths with the assistance of Rayleigh backscattering as the stabilizer of peak power variations. The proposed laser consists of a combination of the semiconductor optical amplifier (SOA) and erbium-doped fiber amplifier (EDFA) as the amplifying media. Three fiber Bragg gratings are employed as the selective wavelength selectors at 1544, 15747 and 1550 nm. At 110 mA SOA current and 18 dBm EDFA output power, a flattened output spectrum with 0.9 dB peak power variation is attained. In terms of stability, the maximum peak power fluctuation for the individual laser is 0.24 dB within a 120 min observation period. Without the Rayleigh backscattering effect, the peak power flatness is severely degraded. This shows that the weakly distributed photons can be utilized as peak power stabilizers in fiber laser systems.

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HAMIDA, B. A., X. S. CHENG, A. W. NAJI, et al. "OPTICAL AMPLIFIER WITH FLAT-GAIN AND WIDEBAND OPERATION UTILIZING HIGHLY CONCENTRATED ERBIUM-DOPED FIBERS." Journal of Nonlinear Optical Physics & Materials 21, no. 01 (2012): 1250005. http://dx.doi.org/10.1142/s0218863512500051.

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In this paper, we proposed a flat-gain and wide-band erbium doped fiber amplifier (EDFA) using two chirped fiber Bragg grating (CFBG) in serial configuration for double-pass operation. The amplifier consists of two sections of Erbium-doped fiber (EDF) operating in C-band and L-band respectively. A CFBG is used in each section to reflect the amplified signal back to the active area so that the overall gain spectrum can be enhanced and flattened. It is also observed that the gain of the amplifier produces a relatively higher gain with the Bismuth-based EDF (Bi-EDF) in the first stage compared to that of silica-based EDF (Si-EDF), especially in a longer wavelength region. The small signal gain of more than 19 dB is obtained within a wavelength region from 1545 to 1605 nm by the use of Bi-EDF with a small noise figure penalty. With a Si-EDF, the flat gain spectrum is observed within a wavelength region ranging from 1535 nm to 1605 nm with a gain variation of less than 2 dB at input signal of 0 dBm. This shows that the proposed serial double-pass amplifier may find its broad applications in wavelength division multiplexing long-haul systems as well as local optical networks.

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Bilal, Mehak. "EDFA and Optical Fiber Repositioning in an Optical Fiber Communication Network." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (2021): 1100–1105. http://dx.doi.org/10.22214/ijraset.2021.38874.

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Abstract: This study shows an easy and effective design of an optical fiber communication system, which demonstrates EDFA's ideal position in the whole system. In recent years, erbium-doped fiber amplifiers (EDFAs) have been more attentive with the development of high-speed and long-distance data transmission systems. In our research, EDFA's forward pump capacity is maintained at 100mW, and our three configurations modify and analyze the location of EDFA. First configuration is meant to place EDFA before optical fiber in the entire system. The second arrangement has been intended such that EDFA will precede optical fiber. EDFA is inserted in the third configuration between the optical fiber length. For the three setups, the BER, Q factor and output power level were observed, with the setup one having minimal BER, setup two with the greatest power, and setup three with the maximum Q factor. This paper discusses the causes behind these results and designers may construct an optical fiber communication system in the most efficient and reliable fashion by taking those results into consideration. The simulation was performed in Opti-System software. Keywords: EDFA, BER, Q factor, Analyzer, Optical fibre

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Journal articles on the topic 'Erbium doped fiber amplifier (EDFA)'

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