Relevant bibliographies by topics / NRZ/RZ coding / Journal articles
To see the other types of publications on this topic, follow the link: NRZ/RZ coding.

Journal articles on the topic 'NRZ/RZ coding'

Author: Grafiati
Published: 4 June 2025
Last updated: 23 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 22 journal articles for your research on the topic 'NRZ/RZ coding.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Aldha Rasjman Sayoga, I. Putu, Pande Ketut Sudiarta, and Nyoman Putra Sastra. "PENGEMBANGAN MODUL PRAKTIKUM UNTUK PERBANDINGAN UNJUK KERJA LINE CODING RZ DAN NRZ PADA JARINGAN FIBER OPTIK." Jurnal SPEKTRUM 8, no. 1 (2021): 148. http://dx.doi.org/10.24843/spektrum.2021.v08.i01.p17.

Full text
Abstract:
The important thing to consider in the process of sending optical fiber network signals is theselection of line coding types. Line coding is a process of converting digital data into digital signals sothat they can be transmitted in optical fiber networks. Line codings commonly used are NRZ and RZ.Therefore, this research discussed the comparison of the performance of NRZ and RZ line codings infiber-optic networks in terms of Q-Factor, BER, and Eye Diagram. The result of this research was thecharacteristic form of the electric signal line coding NRZ with one data element using one signalelement, while in the RZ coding line, one data element used two signal elements. The maximum risetime variable using the RZ coding line is 0.3 bits, while the NRZ coding line is 0.7 bits. The bestrectangle shape model using line coding RZ is sine while line coding NRZ is exponential. Themaximum bit rate using the RZ coding line is 11.5 Gbps while using the NRZ coding line is 18 Gbps.The maximum transmission distance using the RZ and NRZ coding line is 75 km. Another output ofthis research is a practicum module that can be used by students of the Electrical Engineering StudyProgram to understand optical communication systems, especially line coding RZ and NRZ. Based onthe results of student assessments of 87.6% and the post-test score which is higher than the pre-testscore, the practicum module is feasible as teaching material.
APA, Harvard, Vancouver, ISO, and other styles
2

Ammar, Syed Mohammad, Muhammad Amirul Anuar, Norshamsuri Ali, et al. "Performance Analysis of Various Detection Techniques in SAC-OCDMA with NRZ and RZ Line Coding." Journal of Advanced Research in Applied Sciences and Engineering Technology 64, no. 2 (2025): 10–18. https://doi.org/10.37934/araset.64.2.1018.

Full text
Abstract:
Flexible Double Weight (FDW) Optical Code Division Multiple Access (OCDMA) Code is a newly developed code within DW family. Data format in communication system consist of two types which is Non-Return Zero (NRZ) and Return Zero (RZ) line code. Simulation analysis was carried out by using simulation tools Optisystem 15 to determine the performance of FDW system with different data formats. The analysis used different detection technique such as Single-Photodiode Detection (SPD) and Spectral Direct Detection (SDD). Based on the observation, NRZ has better performance than RZ as NRZ data transmission can reach 10 km more than RZ. RZ has better Bit Error Rate (BER) than NRZ at shorter fiber length. Different detection technique has the highest impact on FDW system performance as it eliminates Multiple Access Interference (MAI) and suppress Phase Induced Intensity Noise (PIIN). FDW system with SPD using NRZ data format has best results as it can support the longest fiber length at 5 Gbps bit rate.
APA, Harvard, Vancouver, ISO, and other styles
3

Hadj Ali, Bakir. "Performance Comparison Between Direct and External Modulation Using RZ and NRZ Coding." ELEKTRIKA- Journal of Electrical Engineering 19, no. 1 (2020): 1–8. http://dx.doi.org/10.11113/elektrika.v19n1.144.

Full text
Abstract:
Such as in any optical communication system, the light modulation is considered a main key to determine the performance (or the maximum) of the data rate that can be transmitted and over what the long distance can be applied. So, a choice of the modulation type in any optical link is more important and should base on measuring of the BER and the Q factor parameters. In that issue, we propose a comparative study as contribution between the principle or the schemes of the direct modulation (DM) and the external modulation (EM) respectively, which the chirp frequency modeling is described for the two modulations. However, the main issues addressed also in the simulation analysis when the amount of the chirp (in GHz) introduced for the two modulations applied is discussed, and also the Q factor introduced using different power values and, in different data rate for the two modulations studied is presented where we can determine from these results of the Q factor the effect of the power and the limit of applying the direct modulation and the external modulation in terms of the maximum of the data rate that can be transmitted. Moreover, we provide a numerical results of the Q factor and the BER for the two modulations (DM and EM) using RZ and NRZ format codes at different distance transmission, and in different data rate through these results we can conclude in which code (RZ and NRZ) the DM and the EM performed better.
APA, Harvard, Vancouver, ISO, and other styles
4

Dong-Nhat, Nguyen, Mohamed A. Elsherif, Hoa Le Minh, and Amin Malekmohammadi. "NRZ versus RZ over Absolute Added Correlative coding in optical metro-access networks." Optics Communications 387 (March 2017): 30–36. http://dx.doi.org/10.1016/j.optcom.2016.11.017.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Zhao, Shuang Le. "Study of the Bidirectional PON Performance Based on the Optisystem." Applied Mechanics and Materials 385-386 (August 2013): 1541–45. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1541.

Full text
Abstract:
This paper presents the background of PON (Passive Optical Network), introduces the powerful communication design and simulating software which named Optisystem, show the PON(Passive Optical Network) theory and structure, designs the PON fiber link which has 1310nm uplink wavelength and 1490nm downlink wavelength and then analyses the models performance. In the software, we set up a rate of 1Gbps model of PON by using the component in the Optisystem. Through calculating the model, the document gets the spectrum figure of the simulate fiber link, and analyses the parameter, such as spectrum character, Q factor, eye diagram and BER, the result verified the validity and practicable of the models design, makes the result that the initial character fiber link cant meet the demand of optical communication, so changing the transmission distance to 10 km , transmitter power to-1dBm, meeting and obtaining the basic requirements of the system performance, after that the paper comparing the coding between none return to zero (NRZ) and return to zero (RZ) encoded mode, the eye diagram analyzer component show that NRZ code is better than RZ code, in the end of the paper there is the conclusion.
APA, Harvard, Vancouver, ISO, and other styles
6

Eid, Mahmoud M. A., and Ahmed Nabih Zaki Rashed. "Hybrid NRZ/RZ line coding scheme based hybrid FSO/FO dual channel communication systems." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 2 (2021): 866. http://dx.doi.org/10.11591/ijeecs.v22.i2.pp866-873.

Full text
Abstract:
<p><span id="docs-internal-guid-52ae510c-7fff-0f9d-c23b-ec77d8fd1141" style="font-size: 9pt; font-family: 'Times New Roman'; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">This </span><span id="docs-internal-guid-22aadf85-7fff-c447-0533-2748148ff46b" style="font-size: 9pt; font-family: 'Times New Roman'; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">study simulates the hybrid non return to zero (NRZ)/return to zero (RZ) line coding scheme based hybrid free space optics (FSO)/fiber optics (FO) dual channel communication systems. The max Q factor/Min BER are simulated after APD receiver based both erbium doped fiber amplifiers (EDFAs) and wide band traveling wave semiconductor optical amplifiers (WBTWSOAs) with 50 km fiber channel and 4 km FSO channel. Max SPAL/min noise SPAL, max signal power amplitude/min noise signal power variations with spectral frequency, and the total electrical power are demonstrated and clarified in this proposed study. This work emphasized that the fiber channel is reached up to 100 km reach and FSO channel can be also extended to 4 km reach with 40 Gbps.</span></p>
APA, Harvard, Vancouver, ISO, and other styles
7

Eid, Mahmoud M. A., and Ahmed Nabih Zaki Rashed. "Hybrid NRZ/RZ line coding scheme based hybrid FSO/FO dual channel communication systems." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 2 (2021): 866–73. https://doi.org/10.11591/ijeecs.v22.i2.pp866-873.

Full text
Abstract:
This study simulates the hybrid non return to zero (NRZ)/return to zero (RZ) line coding scheme based hybrid free space optics (FSO)/fiber optics (FO) dual channel communication systems. The max Q factor/Min BER are simulated after APD based both erbium doped fiber amplifiers (EDFAs) and wide band traveling wave semiconductor optical amplifiers (WBTWSOAs) with 50 km fiber channel and 4 km FSO channel. Max SPAL/min noise SPAL, max signal power amplitude/min noise signal power with spectral frequency, and the total electrical power are demonstrated and clarified in this proposed study. This work emphasized that the fiber channel is reached up to 100 km reach and FSO channel can be also extended to 4 km reach with 40 Gbps.
APA, Harvard, Vancouver, ISO, and other styles
8

Oliveira, Jackson Moreira, Hudson Afonso Batista da Silva, Fabio Barros de Sousa, et al. "Verification of All-Optical Regeneration with Hybrid Modulation and with On-Off Keying Modulation with Return to Zero and Non-Return to Zero Coding." Journal of Computational and Theoretical Nanoscience 17, no. 11 (2020): 4875–84. http://dx.doi.org/10.1166/jctn.2020.9628.

Full text
Abstract:
In this work we study the non-linear effects through the analysis of the operating results of three alloptical 3R regeneration (re-amplifying, re-shaping and re-timing) under the effects of cross-phase modulation (XPM) and four-wave mixing (FWM), being a system with hybrid modulation and two other communication systems with modulation on-off keying (OOK) with return to zero (RZ) and non-return to zero (NRZ) coding. The main part of the 3R regeneration system proposed here is a Mach-Zehnder interferometer (MZI) composed of an acousto optical filter (AOF) and a highly nonlinear photonic crystal fiber (HNL-PCF), so the system proposed here was named 3R-MZIAOF regenerator. The comparison of the system results occurred through the variation of the input power variation from -10 dBm to 10 dBm for the link length of 121.3 km and transmission rate 10 Gbps. The results showed that the regeneration 3R scheme OOK-NRZ with AOF presented excellent values of bit error rate (BER) equal to 10-21 and quality factor (Q-Factor) equal to 9.4, when compared to a system with OOK-NRZ 3R regeneration and hybrid modulation.
APA, Harvard, Vancouver, ISO, and other styles
9

Hazem, M. El-Hageen, M. Alatwi Aadel, and Nabih Zaki Rashed Ahmed. "Advanced modulation coding schemes for an optical transceiver systems–based OWC communication channel model." Bulletin of Electrical Engineering and Informatics 10, no. 2 (2021): 767~775. https://doi.org/10.11591/eei.v10i2.2433.

Full text
Abstract:
This paper examines advanced modulation coding schemes for an optical transceiver systems–based optical wireless communication (OWC) channel model. These modulation techniquesinclude On-Off keying and return to zero (RZ)/non–return to zero (NRZ) coding. The signal power level against time and frequency spectral variations are measured. The max. Q factor and min. bit error rate (BER) are estimated and clarified for each modulation code scheme by using an optisystem simulation model. Transmission bit rates of up to 40 Gb/s can be achieved for possible distances up to 500 km with acceptable Q factor. The received power and max. Q factor are measured and clarified with OWC distance variations. The On-Off keying modulation code scheme resulted in better performance than the other modulation code schemes did.
APA, Harvard, Vancouver, ISO, and other styles
10

El-Hageen, Hazem M., Aadel M. Alatwi, and Ahmed Nabih Zaki Rashed. "Advanced modulation coding schemes for an optical transceiver systems–based OWC communication channel model." Bulletin of Electrical Engineering and Informatics 10, no. 2 (2021): 767–75. http://dx.doi.org/10.11591/eei.v10i2.2433.

Full text
Abstract:
This paper examines advanced modulation coding schemes for an optical transceiver systems–based optical wireless communication (OWC) channel model. These modulation techniquesinclude On-Off keying and return to zero (RZ)/non–return to zero (NRZ) coding. The signal power level against time and frequency spectral variations are measured. The max. Q factor and min. bit error rate (BER) are estimated and clarified for each modulation code scheme by using an optisystem simulation model. Transmission bit rates of up to 40 Gb/s can be achieved for possible distances up to 500 km with acceptable Q factor. The received power and max. Q factor are measured and clarified with OWC distance variations. The On-Off keying modulation code scheme resulted in better performance than the other modulation code schemes did.
APA, Harvard, Vancouver, ISO, and other styles
11

Naim, Nani Fadzlina, Muhammad Firdaus Hazian, Suzi Seroja Sarnin, Norsuzila Ya’acob, and Latifah Sarah Supian. "Design and Performance Analysis of DWDM-PON." Journal of Physics: Conference Series 2411, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1742-6596/2411/1/012007.

Full text
Abstract:
Abstract This paper presents on the design and analysis of Dense Wavelength Division Multiplexing Passive Optical Network (DWDM-PON) which is the upcoming trend technology nowadays to transmit up to 40 Gbps data. Various modulation techniques such as Non-Return Zero (NRZ), Return-Zero (RZ) and duo binary coding are simulated in this DWDM-PON. Using OptiSystem software, DWDM-PON is designed and simulated for 32 channels with spacing of 100 GHz and bit rate of 10 Gbps. An Erbium Doped Fiber Amplifier (EDFA) and Dispersion - Compensating Fiber (DCF) is deployed in the DWDM design. It is found that duo binary modulation technique gives the best performance with minimum BER of 2.66x10-19. From the simulation result, it also found that the proposed DWDM PON design is suitable to be deployed for current network.
APA, Harvard, Vancouver, ISO, and other styles
12

Aadel, M. Alatwi, and Nabih Zaki Rashed Ahmed. "Raised cosine/NRZ line coding techniques for upgrading free space optical communication systems through various levels of fog." TELKOMNIKA Telecommunication, Computing, Electronics and Control 18, no. 6 (2020): 2861~2867. https://doi.org/10.12928/TELKOMNIKA.v18i6.16236.

Full text
Abstract:
This study examines raised cosine/NRZ line coding techniques for upgrading free space optical (FSO) communication systems through various levels of fog. The max. Q factors are simulated and estimated for clear air, light fog, and moderate fog weather conditions at a data rate of 20 Gb/s. The optical signal to noise ratio is also measured for different weather conditions. The total power after both FSO channel and avalanche photodiode (APD) photo-detector receiver is estimated by an optical power meter for max. distances. The study shows that the max. propagation distance is extended to 50 km through clear air, 2.25 km through light fog, and 1.6 km through moderate fog with acceptable max. Q factor.
APA, Harvard, Vancouver, ISO, and other styles
13

Yaseen, Zeyad. "Performance Analysis of DPSK Technique for Optical Transmission Systems." Innovation in Technology and Sciences 2021, no. 2 (2021): 6–10. http://dx.doi.org/10.52688/iss2/asp17354.

Full text
Abstract:
The long-distance high data rate transmission is accompanied by many transmission defects, which reduce the performance of optical communication systems. Therefore, due to the need to increase data capacity for the end user, signal regeneration techniques were used to mitigate these non-linear defects in the electric or optical field. Several techniques used to modify the optical signal, which is the possible solution to reduce the limit of non-linear transmission defects, especially before converting the signal from the optical field to the electric field. Since most of the techniques used to reduce the attenuation in the optical signal do not have the ability to reduce the error rate to reach a bit error rate (BER) less than 10-10 with a transmission capacity less than -10dBm. In this paper, the performance evaluation of DPSK has been validated for its adequate use in transmission systems. Nevertheless, the performance of the DPSK optical system was assessed to rely on a different coding format such as: Return to Zero (RZ) & Non-Return to Zero (NRZ-DPSK). The system is designed to withstand high data rate on long-distance optical transmission systems. The system investigated was simulated with OptiSystemTM 13.0 commercial software. The investigated system demonstrated the ability to mitigate nonlinear impairments from the noisy optical DPSK system with high bit-error rate (BER) improvement at low power transmission. Optical DPSK demonstrates the ability to send high-rate data transmission systems for use in the next generation of optical networks.
APA, Harvard, Vancouver, ISO, and other styles
14

Ruchika. "Bidirectional Passive Optical Network Employing Different Line codings/Modulation Formats in Wavelength Reused RSOA Based Symmetrical 10 Gbps." Journal of Physics: Conference Series 2327, no. 1 (2022): 012043. http://dx.doi.org/10.1088/1742-6596/2327/1/012043.

Full text
Abstract:
Abstract Passive optical networks (PONs) with the integration of multiple channels are the high capacity systems to cater the large number of channels in order to fulfill demands of internet applications. To realize a crosstalk suppressed and cost effective system, an integrated multi channel PON for mitigation of the crosstalk between upstream and downstream channels using different pulse shapes such as Return to zero (RZ), non RZ (NRZ), compressed spectrum RZ (CSRZ), Differential phase shift keying (DPSK) is proposed. Use of reflective semiconductor optical amplifier (RSOA) has been proposed for upstream modulation to make system cost efficient. 2-channel downstream and 2-channel upstream wavelengths are used to exhibits total symmetrical data rate of 10 Gbps. Results revealed that proposed system can support 10 Gbps data rate up to 20 km
APA, Harvard, Vancouver, ISO, and other styles
15

Zaki Rashed, Ahmed Nabih, Mittamidi Madhusudhan Reddy, Namgiri Snehith, et al. "Various RZ percentage duty cycle coding with NRZ modulation technique signature on the fiber system performance." Journal of Optical Communications, March 29, 2023. http://dx.doi.org/10.1515/joc-2023-0033.

Full text
Abstract:
Abstract This study has clarified various RZ Percentage Duty Cycle Coding with NRZ modulation Technique Signature on The Fiber System Performance. The total form lighted/electrical power after linear measured multimode fiber/FSO channel measured based different RZ percentage duty cycle coding with the assistance of NRZ modulation techniques is performed. The electrical/lighted form measured power after APD receiver with linear multimode fiber/FSO channel measured based different RZ percentage base band form duty cycle coding with the assistance of NRZ modulation techniques is demonstrated. The lighted based band form can be used for the modulation of the based band electrical signal form based on the RZ percentage duty cycle coding with the assistance of NRZ for both linear measured multimode fiber and FSO measured channel.
APA, Harvard, Vancouver, ISO, and other styles
16

Rashed, Ahmed Nabih Zaki, Mittamidi Madhusudhan Reddy, Sanam Nagendram, et al. "Efficient employment of optical DPSK transmitter with linear multimode fibers and FSO channel under various duty cycle coding effects." Journal of Optical Communications, March 30, 2023. http://dx.doi.org/10.1515/joc-2023-0032.

Full text
Abstract:
Abstract This study has demonstrated the efficient employment of optical DPSK transmitter with linear multimode fibers and FSO channel under various duty cycle coding effects. The light signal power form variations after linear multimode fiber versus spectral wavelength based various RZ-percentage duty cycle coding is clarified. The light signal power form variations after linear multimode fiber versus spectral wavelength based various NRZ duty cycle coding is also clarified. The light power signal form variations after FSO channel versus spectral wavelength based different RZ percentage duty cycle coding is analyzed. Moreover the light power signal form variations after FSO channel versus spectral wavelength based NRZ percentage duty cycle coding is investigated. The light signal power form variations after linear multimode fiber versus spectral wavelength based various RZ percentage duty cycle coding and NRZ modulation code are indicated.
APA, Harvard, Vancouver, ISO, and other styles
17

Sachdeva, Shippu, Manoj Sindhwani, and Krishan Arora. "A high-speed multi input multi output Ro-IsOWC system incorporating Manchester coding and E-LP, O-LP modes." Journal of Optical Communications, November 29, 2022. http://dx.doi.org/10.1515/joc-2022-0281.

Full text
Abstract:
Abstract Aiming at the link length enhancement in intersatellite optical wireless communication (IsOWC) system, considering the hybrid radiofrequency (RF)-enabled multi input multi output (MIMO) system, we accentuate the realization of medium earth orbit (MEO)-based IsOWC system by incorporating different modulation formats such as return to zero (RZ), non-RZ (NRZ), and Manchester coding. A 40 Gbps and 16 × 8 MIMO system enabling 40 GHz RF signal is proposed by using even linear polarized (E-LP) mode, and odd linear polarized (O-LP) mode over a 22,000 km IsOWC channel. Further, a performance comparison of NRZ, RZ, and Manchester coding is performed at different IsOWC distances in terms of the Q factor. Results revealed that the proposed system with Manchester coding and O-LP mode can successfully cover the 22,000 km IsOWC link length by exhibiting a 6.35 Q factor value.
APA, Harvard, Vancouver, ISO, and other styles
18

Prabu, Ramachandran Thandaiah, Ashok Raja, Vanitha Lingaraj, et al. "Various graded index plastic optical fiber performance signature capability with the optimum dispersion control for indoor coverage applications." Journal of Optical Communications, May 16, 2024. http://dx.doi.org/10.1515/joc-2024-0069.

Full text
Abstract:
Abstract This work has clarified the various graded index plastic optical fiber performance signature with the optimum dispersion control for indoor coverage applications. The plastic optical fibers that are deeply employed namely Polymethyl mathacrylate (PMMA), Epoxy, Polyfluorene and Cyclotene. Various plastic optical fiber dispersion is demonstrated against temperature variations. The different plastic fibers pulse broadening is clarified versus temperature variations. The previous plastic optical fibers types with respect to refractive index configuration and number of modes are clarified. Previous studies on PMMA/CYTOP plastic optical fibers attenuation is clarified against wavelength band variations. Various transmission techniques are applied to measure the fiber bandwidth and fiber channel bit rate. These transmission techniques are MTDM, NRZ and RZ coding. Different plastic fiber bandwidth against fiber channel distance is demonstrated based on NRZ, RZ and MTDM coding at room temperature. Different plastic fiber channel bit rate against fiber channel distance is studied and clarified based on NRZ, RZ and MTDM coding at room temperature. The choice of these plastic fibers are high temperature stability and more flexibility/reliability than other plastic fibers. The dispersion of these proposed plastic fibers can be controlled and managed with the control of temperature variations.
APA, Harvard, Vancouver, ISO, and other styles
19

Galeb, Basim. "IMPLEMENTATION OF AN EFFECTIVE FSO WDM SYSTEM UNDER DIFFERENT ATMOSPHERIC CONDITIONS WITH DIFFERENT CODING SCHEMES." JOURNAL OF MECHANICS OF CONTINUA AND MATHEMATICAL SCIENCES 19, no. 6 (2024). http://dx.doi.org/10.26782/jmcms.2024.06.00007.

Full text
Abstract:
In different atmospheric conditions, Free Space Optical (FSO) transmission is vital because it sends data via light beams through the atmosphere. This technique transmits data quickly and efficiently with low signal attenuation in clear weather. This makes it ideal for short- to medium-range communication, especially in urban areas where cables or radio frequency spectrum are impractical. However, fog, rain, and snow can absorb or disperse the light signal, reducing transmission range and reliability for FSO. This research creates an effective FSO system that supports many channels and transmission distances. The suggested system will be tested in four weather conditions (light air, light rain, medium rain, and heavy rain) with attenuation values of 0.47, 1.988, 5.844, and 9.29 dB/km. Optisystem program version 21 designs and evaluates system performance based on QF, BER, and other criteria. In this research, multiple modulation formats are evaluated for best performance. QF exhibited a reversal relationship with distance, while BER showed a direct one. The suggested system can transmit for 25 km, 12 km, 10 km, and less than 6 km in light air, light rain, medium rain, and severe rain. This research also examines system performance under NRZ and RZ modulation formats. NRZ modulation is better for light air and clear weather transmission than RZ modulation since it requires less equipment and is easier to install. Since NRZ modulation requires no clock recovery overhead, bandwidth efficiency is usually higher. In light rain, RZ modulation minimizes optical fiber dispersion, extending transmission distances and improving signal quality. NRZ excels within 10 kilometers. NRZ works for 6 km and 4 km in medium and severe rain, although RZ's dispersion tolerance and synchronization make it better for longer transmission distances. For short distances, NRZ is suitable, but for longer distances, RZ is more resilient due to its better dispersion management and signal transmission.
APA, Harvard, Vancouver, ISO, and other styles
20

Bhoompally, Suneela, Mittamidi Madhusudhan Reddy, Twana Mohammed Kak Anwer, et al. "Distributed feedback laser grating order effects on optical systems with NRZ-RZ line coding scheme performance signature." Journal of Optical Communications, April 17, 2023. http://dx.doi.org/10.1515/joc-2023-0072.

Full text
Abstract:
Abstract This work demonstrated the distributed feedback laser grating order effects on optical system in the presence of NRZ-RZ line coding schemes. Max lighted signal form power variations are studied with spectral base wavelength band variations through optical fiber based on first various distributed based band feedback laser (DFB) grating order. The total lighted form base power band through optical fiber based on first different DFB laser grating order is estimated. The max electrical base signal band power form variations with spectral base frequency form band variations through photo-detector based on various DFB laser grating order is demonstrated. Total electrical based power band form through photo-detector based on various DFB laser grating order is also clarified. Max base band power form band amplitude with time through photo-detector based on different DFB laser grating order is clarified. Max Q base band form is studied numerically with DFB laser grating order variations.
APA, Harvard, Vancouver, ISO, and other styles
21

Singh, Ashish, Kavitha Shekhara, Asia Hazareena, and Mohammad G. Siddiqui. "Design and performance of WDM system for high-speed optical communication on different modulation formats." Journal of Optical Communications, August 8, 2024. http://dx.doi.org/10.1515/joc-2024-0140.

Full text
Abstract:
Abstract In this paper, the performance analysis of the WDM (wavelength division multiplexing) system on the optical fiber transmission link is proposed. High data transmission is possible by implementing a WDM optical communication system using different modulation formats. Firstly, the WDM optical communication system is designed on an Optiwave simulation tool and distortion in the optical fiber by “eye pattern analysis” is analyzed. Secondly, the optical SNR of the proposed WDM optical communication system is studied. Further, the bit-error rate (BER) plot is studied and optimization techniques are applied to enhance the proposed system for long-haul communication. Furthermore, the BER plots are analyzed by varying the length of the fiber and applying different coding techniques like NRZ (non-return zero), RZ (return to zero), QAM (quadrature amplitude modulation) etc. using the Optiwave simulation tool. The results obtained in the Optiwave simulation tool are validated by theoretical implementation in the MATLAB tool.
APA, Harvard, Vancouver, ISO, and other styles
22

Tervydis, Paulius, and Ruta Jankuniene. "A Problem Analysis of RSOA-Based Optical Access." Elektronika ir Elektrotechnika 22, no. 2 (2017). https://doi.org/10.5755/j01.eie.22.2.14601.

Full text
Abstract:
Using WDM multiplexing is one of the ways to increase PON bandwidth. But as WDM-PON is still expensive and difficult administered, the idea of using a Reflective Semiconductor Optical Amplifier (RSOA) is proposed. It can be installed in WDM-PON ONU network devices. A comprehensive problem analysis of various investigations is done relating to a performance of RSOA-based WDM-PON systems. The simulation model is created for RSOA-based WDM-PON access with downstream signal reusing in ONU for upstream transmission. This model helped in researching of RSOA abilities using different downstream and upstream signals modulation. Signal parameters were tested working with special software OptiSystem. Results were evaluated regarding such a characteristics as Q factor, signal attenuation, power and optical fiber length. It was found that RZ code was better suited in remodulation with RSOA; it achieved 1.25 Gbps signal transmission at a distance 8 times larger than that of the in NRZ code case.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography