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Artículos de revistas sobre el tema "Amplified spontaneous emission (ASE)"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Última modificación: 25 de julio de 2025

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1

Felinskyi, Georgii, and Mykhailo Dyriv. "Noise Suppression Phenomenon in Fiber Raman Amplifier." Measurement Science Review 15, no. 3 (2015): 107–10. http://dx.doi.org/10.1515/msr-2015-0016.

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Abstract The problem of small bit error rate is actual in fiber Raman amplifiers. Our experimental data on the amplified spontaneous emission (ASE) with backward pumping as a base of optical noise evaluation are presented in this paper. Raman gain spectrum for useful Stokes low-powered signal is calculated and compared with obtained spectrum of non-coherent ASE noise. It is shown that output optical signal has better gain than the amplified spontaneous emission that leads to appreciable growth of output optical signal-to-noise ratio.

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2

Zhou, Li. "Effect of Spontaneous Radiation of Vertical-Cavity Semiconductor Optical Amplifier Bistability." Advanced Materials Research 945-949 (June 2014): 2209–12. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2209.

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Includes the establishment of the spontaneous radiation of vertical cavity semiconductor optical amplifier (VCSOA) bistable model, numerical analysis and comparison of VCSOA and traditional SOA bistable characteristics of amplified spontaneous emission (ASE) sensitivity.

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3

Huang, H., and G. J. Tallents. "The output of a laser amplifier with simultaneous amplified spontaneous emission and an injected seed." Laser and Particle Beams 27, no. 3 (2009): 393–98. http://dx.doi.org/10.1017/s0263034609000500.

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AbstractThe minimum irradiance needed to overcome amplified spontaneous emission (ASE) of a seed beam injected into a laser amplifier is evaluated. The treatment is particularly applicable to extreme ultraviolet (EUV) and X-ray laser schemes to inject laser harmonic radiation as a seed into (1) plasma laser amplifiers and (2) free-electron lasers. Simple expressions and calculations are given for the minimum injected irradiance required for amplification of the injected seed beam to exceed ASE from the amplifier, including the effects of gain saturation, assuming one dimensional radiative tran

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4

Mamada, Masashi, Hajime Nakanotani, and Chihaya Adachi. "Amplified spontaneous emission from oligo(p-phenylenevinylene) derivatives." Materials Advances 2, no. 12 (2021): 3906–14. http://dx.doi.org/10.1039/d0ma00756k.

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A series of oligo(p-phenylenevinylene) derivatives were fully characterized. Compounds with herringbone packing exhibited amplified spontaneous emission (ASE) thresholds as low as 7.2 μJ cm<sup>−2</sup>, while those with π-stacked structures did not show ASE.

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5

Li, Zhou. "The Spontaneous Radiation of Verticalcavity Semiconductor Optical Amplifiers in Bistable Effect." Advanced Materials Research 712-715 (June 2013): 1807–10. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1807.

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A bistable model is established including the effect of spontaneous emission in a vertical cavity semiconductor optical amplifier (VCSOA). The sensitivities to the amplified spontaneous emission (ASE) of the bistable characteristics in a VCSOA and a traditional edge emitting SOA are compared by numerical analysis. The control of the bistable characteristics and the degeneration of the bistability hysteresis are also analyzed by utilizing the modified model.

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6

Sadegh Kazempourfard, Mohammad, Hamid Nadgaran, and Seyed Mahdi Mousavi. "The effects of pump pulse fluence on the output energy and amplified spontaneous emission of a femtosecond regenerative amplifier." Laser Physics 32, no. 1 (2021): 015002. http://dx.doi.org/10.1088/1555-6611/ac3ee8.

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Abstract In this paper, the effects of pump pulse fluence on the output energy and amplified spontaneous emission (ASE) of a femtosecond regenerative amplifier are investigated. One can easily enhance the output energy of laser amplifiers by increasing their pump fluence. This in turn can increase the ASE and reduce the performance of amplifiers in terms of output beam quality, beam stability, etc. This effect would eventually lead to what is called ‘temporal intensity contrast deterioration’. In this work, it is shown that an optimum state of the pump pulse fluence can indeed optimize the amo

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7

Tang, Baolei, Huapeng Liu, Feng Li, Yue Wang, and Hongyu Zhang. "Single-benzene solid emitters with lasing properties based on aggregation-induced emissions." Chemical Communications 52, no. 39 (2016): 6577–80. http://dx.doi.org/10.1039/c6cc02616h.

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Highly efficient single-benzene solid emitters exhibiting aggregation-induced emission (AIE), crystallization-enhanced emission (CEE), as well as amplified spontaneous emission (ASE) have been obtained based on structurally simple ESIPT-active organic molecules.

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8

Anni, M., and S. Lattante. "Excitation Density Dependence of Optical Oxygen Sensing in Poly(9,9-dioctylfluorene) Waveguides Showing Amplified Spontaneous Emission." ISRN Materials Science 2014 (March 4, 2014): 1–5. http://dx.doi.org/10.1155/2014/856716.

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Reversible oxygen induced emission quenching of both the Spontaneous Emission (SE) and the Amplified Spontaneous Emission (ASE) of poly(9,9-dioctylfluorene) waveguides is demonstrated. We show that ASE shows a stronger quenching than SE, up to about 6.2 times, but also a stronger decrease when the excitation density increases. We conclude that the fast increase of the ASE decay rate is the main process in determining the ASE detection sensitivity, limiting the potentiality of sensitivity improvement of ASE with respect to SE.

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9

Du, P. Y., Z. W. Lu, and D. Y. Lin. "The truncated amplified spontaneous emission pulses in KrF excimer laser by using timeshare quenching." Laser and Particle Beams 32, no. 2 (2014): 271–75. http://dx.doi.org/10.1017/s0263034614000160.

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AbstractIn order to achieve the truncated amplified spontaneous emission pulse, the method of timeshare quenching was proposed in this paper. When the original pulse of the amplified spontaneous emission is 16.72 ns, the obtained best results show that the pulse width is truncated to 2.48 ns, and the shortening ratio is approximately 6.7. By analyzing the 12 acquisition results of the continuous amplified spontaneous emission truncation, 2.59 ± 0.05 ns amplified spontaneous emission pulse was obtained. The experimental results showed that the stability of the truncated pulse width is well. Thi

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10

Leyden, Matthew R., Toshinori Matsushima, Chuanjiang Qin, Shibin Ruan, Hao Ye, and Chihaya Adachi. "Amplified spontaneous emission in phenylethylammonium methylammonium lead iodide quasi-2D perovskites." Physical Chemistry Chemical Physics 20, no. 22 (2018): 15030–36. http://dx.doi.org/10.1039/c8cp02133c.

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11

Wang, Xiong, Pu Zhou, Xiaolin Wang, Hu Xiao, and Lei Si. "51.5 W monolithic single frequency 1.97 m Tm-doped fiber amplifier." High Power Laser Science and Engineering 1, no. 3-4 (2013): 123–25. http://dx.doi.org/10.1017/hpl.2013.20.

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AbstractWe demonstrate a monolithic single frequency Tm-doped fiber amplifier with output power of 51.5 W. A single frequency fiber laser at 1.97 $\mathrm {\mu} $m is amplified by a cascaded master oscillator power amplifier (MOPA) system with all-fiber configuration. The optical-to-optical conversion efficiency of the main fiber amplifier is 45%. No amplified spontaneous emission (ASE) or stimulated Brillouin scattering (SBS) effect is observed in the fiber amplifier. The output power could be further scaled by launching more pump power.

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12

Lei, Jiayang, Shuang Qiu, Kuo Yang, and Xiaoyu Zhao. "Research Status of Amplified Spontaneous Emission Sources based on Doped Materials." Journal of Physics: Conference Series 2248, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1742-6596/2248/1/012006.

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Abstract Amplified spontaneous emission (ASE) was once considered a harmful parasitic effect. This is because ASE will reduce the number of the inverted population in the gain medium, thereby reducing the efficiency of lasers. However, the output characteristics of ASE make it applicable to many studies. Therefore, the experimental settings and beam output characteristics of different doped laser ASE sources are summarized in this review. The summarization begins with the characteristics of ASE, such as threshold condition. Then, two doped fiber lasers are introduced. Based on erbium-doped fib

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13

Muñoz-Mármol, Rafael, Víctor Bonal, Giuseppe M. Paternò, et al. "Dual Amplified Spontaneous Emission and Lasing from Nanographene Films." Nanomaterials 10, no. 8 (2020): 1525. http://dx.doi.org/10.3390/nano10081525.

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Chemically synthesized zigzag-edged nanographenes (NG) have recently demonstrated great success as the active laser units in solution-processed organic distributed feedback (DFB) lasers. Here, we report the first observation of dual amplified spontaneous emission (ASE) from a large-size NG derivative (with 12 benzenoid rings) dispersed in a polystyrene film. ASE is observed simultaneously at the 685 and 739 nm wavelengths, which correspond to different transitions of the photoluminescence spectrum. Ultrafast pump-probe spectroscopy has been used to ascertain the underlying photophysical proces

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14

Yu, Junhong, Sushant Shendre, Weon-kyu Koh, et al. "Electrically control amplified spontaneous emission in colloidal quantum dots." Science Advances 5, no. 10 (2019): eaav3140. http://dx.doi.org/10.1126/sciadv.aav3140.

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Colloidal quantum dots (CQDs) are highly promising materials for light amplification thanks to their efficient photoluminescence, tunable emission wavelength and low-cost synthesis. Unfortunately, CQDs are suffering from band-edge state degeneracy which demands multiple excitons to achieve population inversion. As a result, non-radiative Auger recombination increases the lasing threshold and limits the gain lifetime. Here, benefiting from the negative charging, we demonstrate that the amplified spontaneous emission (ASE) threshold is controllable in a device where CQD film is exposed to an ext

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15

Triolo, Claudia, Maria Luisa De Giorgi, Antonella Lorusso, et al. "Light Emission Properties of Thermally Evaporated CH3NH3PbBr3 Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons." Nanomaterials 12, no. 2 (2022): 211. http://dx.doi.org/10.3390/nano12020211.

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Over the past decade, interest about metal halide perovskites has rapidly increased, as they can find wide application in optoelectronic devices. Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical properties of thermally deposited perovskite layers (spontaneous and amplified spontaneous emission) have been poorly investigated. This paper is a study from a nano- to micro- and macro-scale about the role of light-emitting species (namely free carriers and excitons) and trap states in the spontaneous

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16

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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17

Zhou, Xuehong, Linlin Liu, Xiaoyan Wu, et al. "An Au NP doped buffer layer in a slab waveguide for enhancement of organic amplified spontaneous emission." Journal of Materials Chemistry C 5, no. 6 (2017): 1356–62. http://dx.doi.org/10.1039/c6tc04893e.

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18

Ahn, Namyoung, Clément Livache, Valerio Pinchetti, et al. "Electrically driven amplified spontaneous emission from colloidal quantum dots." Nature 617, no. 7959 (2023): 79–85. http://dx.doi.org/10.1038/s41586-023-05855-6.

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AbstractColloidal quantum dots (QDs) are attractive materials for realizing solution-processable laser diodes that could benefit from size-controlled emission wavelengths, low optical-gain thresholds and ease of integration with photonic and electronic circuits1–7. However, the implementation of such devices has been hampered by fast Auger recombination of gain-active multicarrier states1,8, poor stability of QD films at high current densities9,10 and the difficulty to obtain net optical gain in a complex device stack wherein a thin electroluminescent QD layer is combined with optically lossy

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19

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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20

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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21

Zeb, Muhammad, Muhammad Tahir, Fida Muhammad, et al. "Amplified Spontaneous Emission and Optical Gain in Organic Single Crystal Quinquethiophene." Crystals 9, no. 12 (2019): 609. http://dx.doi.org/10.3390/cryst9120609.

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In this paper, we report optical characteristics of an organic single crystal oligomer 5,5⁗-diphenyl-2,2′:5′,2″:5″,2‴:5‴,2⁗-quinquethiophene (P5T). P5T crystal is a thiophene/phenylene co-oligomer that possesses better charge mobility as well as photoluminescence quantum efficiency (PLQE) as compared to other organic materials. Stimulated emission in P5T is investigated via amplified spontaneous emission (ASE) measurements within broad pump energies ranging from 35.26 to 163.34 µJ/cm2. An Nd-YAG femtosecond-tunable pulsed laser is used as a pump energy source for the ASE measurements of P5T cr

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22

Mohamadi, Arastoo, and Hamid Poorantiyosh. "Amplified spontaneous emission (ASE) effect on gain and stored energy." Journal of Optics 49, no. 4 (2020): 469–75. http://dx.doi.org/10.1007/s12596-020-00638-y.

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23

Qaid, Saif M. H., Fahhad H. Alharbi, Idriss Bedja, Mohammad Khaja Nazeeruddin, and Abdullah S. Aldwayyan. "Reducing Amplified Spontaneous Emission Threshold in CsPbBr3 Quantum Dot Films by Controlling TiO2 Compact Layer." Nanomaterials 10, no. 8 (2020): 1605. http://dx.doi.org/10.3390/nano10081605.

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Amplified spontaneous emission (ASE) threshold in CsPbBr3 quantum dot films is systematically reduced by introducing high quality TiO2 compact layer grown by atomic-layer deposition. Uniform and pinhole-free TiO2 films of thickness 10, 20 and 50 nm are used as a substrates for CsPbBr3 quantum dot films to enhance amplified spontaneous emission performance. The reduction is attributed indirectly to the improved morphology of TiO2 compact layer and subsequently CsPbBr3 active layer as grown on better quality substrates. This is quantified by the reduced roughness of the obtained films to less th

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24

Zhang, Wei Yi, Ji Ping Ning, and Bo Chen. "Suppression of ASE by Using Pulsed-Pumped Technique in Fiber Amplifier." Advanced Materials Research 403-408 (November 2011): 2508–12. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.2508.

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Implementation of pulsed-pump technique in fiber amplifier is highly useful in the situation of low repetition rate and high energy pulses operation. In this paper, the ASE (Amplified Spontaneous Emission) dynamics simulation in a pulsed-pumped ytterbium-doped double-clad fiber amplifier is presented for the first time, which provides important guidance about optimizing the pulsed-pump mode. The simulations of ASE dynamics are carried out by solving the rate equations and light power propagation equations in fiber using the finite elements analysis method, including variations of ASE output po

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25

Hoshino, Shoma, Mitsunori Araki, Takashi Ishiwata, and Koichi Tsukiyama. "Infrared amplified spontaneous emission from the 0+g (3P0) and 0+g (1D2) ion-pair states of molecular bromine." Physical Chemistry Chemical Physics 18, no. 28 (2016): 19464–71. http://dx.doi.org/10.1039/c6cp02117d.

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26

Qin, Liang, Longfeng Lv, Chunhai Li, et al. "Temperature dependent amplified spontaneous emission of vacuum annealed perovskite films." RSC Advances 7, no. 26 (2017): 15911–16. http://dx.doi.org/10.1039/c7ra01155e.

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27

Yamazawa, Chieko, Yoshinori Hirano, Hiroaki Imoto, Naoto Tsutsumi, and Kensuke Naka. "Superior light-resistant dithieno[3,2-b:2′,3′-d]arsole-based polymers exhibiting ultrastable amplified spontaneous emission." Chemical Communications 57, no. 13 (2021): 1595–98. http://dx.doi.org/10.1039/d0cc07521c.

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28

Martín, Raúl, Pilar Prieto, José R. Carrillo, et al. "Design, synthesis and amplified spontaneous emission of 1,2,5-benzothiadiazole derivatives." Journal of Materials Chemistry C 7, no. 32 (2019): 9996–10007. http://dx.doi.org/10.1039/c9tc03148k.

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The design, synthesis and evaluation of the amplified spontaneous emission (ASE) properties of a series of arylalkynyl-benzo[c][1,2,5]thiadiazole (BTD) and [1,2,5]thiadiazolo[3,4-g]quinoxaline (TDQ) derivatives are described.

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29

Lin, Ja-Hon, Gung-Rong Chen, Sheng-Jie Li, Yu-Feng Song, and Wei-Rein Liu. "Gain-Guiding Anisotropic Polarized Amplified Spontaneous Emissions from C-Plane ZnO/ZnMgO Multiple Quantum Wells." Materials 15, no. 19 (2022): 6668. http://dx.doi.org/10.3390/ma15196668.

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A microcavity laser with linear polarization finds practical applications in metrology and biomedical imaging. Through a pulsed light excitation, the polarization characteristics of amplified spontaneous emissions (ASEs) from ten-period ZnO/Zn0.8Mg0.2O multiple quantum wells (MQWs) on a C-Plane sapphire substrate were investigated at room temperature. Unlike unpolarized spontaneous emissions, with 35 meV of energy differences between the C and AB bands, the ASE of MQWs revealed transverse-electric (TE) polarization under the edge emission configuration. The excited ASE from the surface normal

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30

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 obt

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31

Yip, R. W., and Y.-X. Wen. "High-resolution amplified spontaneous emission (ASE) gain spectroscopy to study excited state complexation." Canadian Journal of Chemistry 69, no. 12 (1991): 2142–49. http://dx.doi.org/10.1139/v91-309.

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Weakly bound excited state complexes involving 7-diethylamino-4-methylcoumarin have been studied by ASE gain spectroscopy to explore the applicability of the method for studying excited state complexation. Comparative steady state spectrofluorometric and ASE gain measurements showed that ASE gain measurements are capable of giving information on excited state complexation of the laser dye but with greater ease and frequency resolution. Key words: excited state complex, amplified spontaneous emission, laser gain, ASE gain spectroscopy

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32

Jin, Guangrong, Tanghao Liu, Yuanzhao Li, et al. "Low-dimensional phase suppression and defect passivation of quasi-2D perovskites for efficient electroluminescence and low-threshold amplified spontaneous emission." Nanoscale 14, no. 3 (2022): 919–29. http://dx.doi.org/10.1039/d1nr06549a.

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Synergistically tailoring phase components and reducing trap density enable quasi-2D perovskites to achieve light-emitting diodes (LEDs) with high efficiency and amplified spontaneous emission (ASE) with low threshold.

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33

KAUR, GURMEET, M. L. SINGH, and M. S. PATTERH. "THEORETICAL INVESTIGATIONS TO MINIMIZE BIT ERROR RATE BY OPTIMIZING SYSTEM PARAMETERS IN OPTICAL DWDM TRANSMISSION SYSTEMS AT DIFFERENT DATA RATES." Journal of Nonlinear Optical Physics & Materials 18, no. 03 (2009): 501–19. http://dx.doi.org/10.1142/s0218863509004750.

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The amplifier separation and channel separation has conflicting effects on the noise generated due to the fiber non-linear effects (Stimulated Raman scattering SRS and Four wave mixing FWM) and the Amplified spontaneous emission (ASE) noise introduced by inline optical amplifications. While designing an efficient Dense Wavelength Division Multiplexing (DWDM) system, optimization of the channel separation and amplifier separation are required to minimize the non-linear effects (FWM and SRS) along with the ASE noise. In this paper, theoretical investigations of the optical DWDM systems have been

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34

Guo, Lei, Xiao Liu, Tongxin Zhang, Hai-Bin Luo, Hai Hua Fan, and Man Shing Wong. "Star-shaped triazine-cored ladder-type ter(p-phenylene)s for high-performance multiphoton absorption and amplified spontaneous blue emission." Journal of Materials Chemistry C 8, no. 5 (2020): 1768–72. http://dx.doi.org/10.1039/c9tc06025a.

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Lacking high-performance blue emissive multiphoton absorption (MPA) materials particularly for frequency up-converted amplified spontaneous emission (ASE) or lasing hampers novel breakthroughs in a wide-range of laser-based applications.

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35

Bai, Xiaolei, Meng Wang, Yuxing Yang, Zhiguo Lv, and Weiguo Jia. "Yb-ASE Suppression in Single-Frequency Hybrid Double Cladding Erbium–Ytterbium Co-Doped Fiber Amplifier with SMS Structure." Applied Sciences 11, no. 19 (2021): 9334. http://dx.doi.org/10.3390/app11199334.

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A hybrid double cladding erbium–ytterbium co-doped fiber (EYDF) amplifier with a single-mode-multimode-single-mode (SMS) active fiber is demonstrated in this study. The hybrid gain fiber with an SMS structure is composed of two kinds of EYDFs with 6 and 12 μm core diameters. The transmission spectra of the SMS fiber structure were theoretically analyzed and the simulation results indicated that the maximum loss in the 1~1.1 μm band where the Yb-band amplified spontaneous emission (Yb-ASE) located, was much larger than that of the 1.5-μm band because of the wavelength difference. The power perf

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36

Guo, Xuanchen, Quan Chai, Xueying Zhao, et al. "Correlation between emission and relative intensity noise spectral profiles of an Er-doped fiber superfluorescent source." AIP Advances 12, no. 5 (2022): 055226. http://dx.doi.org/10.1063/5.0081940.

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The spectral characteristics of the relative intensity noise (RIN) of two amplified spontaneous emission (ASE) sources are experimentally measured. An Er-doped fiber superfluorescent source (EDF-SFS) is investigated and compared with a super-luminescent diode (SLD) source, using a simple tunable fiber Bragg grating filter-based system. Experimental results based on normal ASE operation conditions showed that the RIN distribution of the EDF-SFS is correlated with its emission spectral profile, which is different from the results observed using the SLD source. This finding shows for the first ti

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37

Guan, Biao, Fengping Yan, Wenguo Han, et al. "High-Power, Narrow-Linewidth, Continuous-Wave, Thulium-Doped Fiber Laser Based on MOPA." Photonics 10, no. 4 (2023): 347. http://dx.doi.org/10.3390/photonics10040347.

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A high-power, narrow-linewidth, continuous-wave, thulium-doped fiber laser (TDFL) based on a master-oscillator power-amplifier (MOPA) was experimentally demonstrated. The main oscillator (seed source) yielded 0.64 W of narrow-linewidth laser output at a central wavelength of 1940.32 nm and a 3 dB spectral bandwidth of 0.05 nm. The output narrow-linewidth laser from the main oscillator was amplified by two-stage, cladding-pumped, thulium-doped, all-fiber amplifiers. The main amplifier yielded 26 W of narrow-linewidth laser at a central wavelength of 1940.33 nm. The slope efficiency of the main

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38

Jin, Zhao Hui, Ying Guo, Hua Jing Gao, and Kazuo Kasatani. "Amplified Spontaneous Emission from the Oriented NK-2014-Doped Nematic Liquid Crystal Layer." Advanced Materials Research 554-556 (July 2012): 23–26. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.23.

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Although lasing has been observed in the solid state for numerous organic molecules emitting at visible wavelengths, this is few case in the infrared. We show amplified spontaneous emission (ASE) in the near infrared (913-930 nm) from the layer of a cyanine dye-doped 4-cyano-4'-pentylbiphenyl (5CB) for laser power above 0.08 GW/cm2, the layer was prepared with the solution of 1,1',3,3,3',3'- hexamethyl-4,4',5,5'-di-benzo-2,2'-indotricarbocyanine perchlorate (NK-2014) dissolved in 5CB. Oriented NK-2014 molecules in nematic liquid crystal (NLC) must have very high amplified spontaneous emission

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39

Janassek, Patrick, Andreas Herdt, Sébastien Blumenstein, and Wolfgang Elsäßer. "Ghost Spectroscopy with Classical Correlated Amplified Spontaneous Emission Photons Emitted by An Erbium-Doped Fiber Amplifier." Applied Sciences 8, no. 10 (2018): 1896. http://dx.doi.org/10.3390/app8101896.

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We demonstrate wavelength-wavelength correlations of classical broad-band amplified spontaneous emission (ASE) photons emitted by an erbium-doped fiber amplifier (EDFA) in a wavelength regime around 1530 nm. We then apply these classical correlated photons in the framework of a real-world ghost spectroscopy experiment at a wavelength of 1533 nm to acetylene ( C 2 H 2 ) reproducing the characteristic absorption features of the C-H stretch and rotational bands. This proof-of-principle experiment confirms the generalization of an ASE source concept offering an attractive light source for classica

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40

Hu, Jin Hang, Ya Lin Guan, and Jin Cai Lin. "Effects of ASE on DPSK Modulation Formats with Different Duty-Ratio in Optical Transmission System." Applied Mechanics and Materials 385-386 (August 2013): 1595–98. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1595.

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In optical networks, erbium-doped fiber amplifiers (EDFAs) are used to provide a wide and flat gain spectrum. Amplified Spontaneous Emission (ASE) emitted from EDFA adds to signal and grows rapidly. This accumulated ASE noise may limit the effective amplification due to saturation effect and affects the receivers bit error ratio (BER). In this paper, we show the impact of ASE noise in transmission fiber by using three different modulation formats: 33%DPSK, 66%DPSK and DPSK. In recent years, optical fiber communication system began to use the DPSK (Differential Phase Shift Keying) format to rep

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41

Devika, K. R., Merin Joby, Frincy Francis, C. P. Jinsi, Riju C. Issac, and Santhi Ani Joseph. "Amplified spontaneous emission from ZnO nanostructures as scatterers in rhodamine 6G." IOP Conference Series: Materials Science and Engineering 1233, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1757-899x/1233/1/012006.

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Abstract Under high power, Nd: YAG 532nm, ns pulsed laser spectral narrowing of an amplified spontaneous emission (ASE) from ZnO nanostructures in rhodamine 6G has been studied. The dependence of emission intensity on excitation power, particle density of ZnO nanostructures, and silica as scatterers show a distinct threshold. The Full width half maximum (FWHM) substantially reduces from 46 nm to 3.16 nm at high excitation power and ZnO-silica scatterer inclusion.

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42

Gao, Qi, Gang Li, Xiangping Zhu та ін. "Backscattered Background Noise of the Lidar Ceilometer Influence Imposed by ASE in Single-Frequency Nanosecond Pulsed Laser at 1.5 μm". Photonics 10, № 10 (2023): 1120. http://dx.doi.org/10.3390/photonics10101120.

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In this work, we demonstrate a three-stage all-fiber master oscillator power amplifier (MOPA) system emitting over 1 W of the linearly polarized narrow-linewidth pulse output power with 10 kHz pulse repetition frequency and 400 ns pulse width without the amplified spontaneous emission (ASE) at ~1.5 µm. Initially, we analyze the effect of the ASE on the first derivative of backscatter intensity via a contrast experiment. The experiment results show that the noise intensity with angle of inclination is affected by the ASE of the amplifier, thereby decreasing the signal-to-noise ratio of the outp

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43

YAMAMOTO, T., K. FUJII, A. TAGAYA, E. NIHEI, Y. KOIKE, and K. SASAKI. "HIGH-POWER OPTICAL SOURCE USING DYE-DOPED POLYMER OPTICAL FIBER." Journal of Nonlinear Optical Physics & Materials 05, no. 01 (1996): 73–88. http://dx.doi.org/10.1142/s0218863596000088.

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Basic characteristics of organic-dye doped polymer optical fibers (DPOFs) are demonstrated. The devices contain laser dye, such as Rhodamine 6G (R6G) and Rhodamine B (RB) in the core region. Firstly, amplification characteristics of DPOF amplifiers (PO-FAs) excited by a pulse-operated, doubled Nd:YAG laser are demonstrated, e.g., a 250 mm-length of RB-POFA gives 1 kW (30 dB) of amplified signal at 591 nm. Next, an all solid state system of RB DPOF laser (POFL) is discussed by numerical simulation and the experimental result of high-power amplified spontaneous emission (ASE) by strong excitatio

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44

Nie, Yu Mei. "High-Gain Laser Diode Array Side Pumped Nd: Glass Rod Amplifier." Advanced Materials Research 529 (June 2012): 115–19. http://dx.doi.org/10.4028/www.scientific.net/amr.529.115.

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With the optimized side pumped module structure, three laser diode arrays rotating symmetrically pump the Nd: Glass rod. The size of the Nd: Glass rod is Φ2 mm×75mm, with the doping concentration of 4at%. The surface of both ends of the rod coated with antireflection film at 1053nm, the rod was tilted 1.5°in order to eliminate the oscillation of amplified spontaneous emission (ASE). The seed, with energy 10μJ, operating frequency of 1Hz, pulse width 3ns, output wavelength 1053nm, through the Nd: Glass amplifiers reaches 70 times stable high-gain when the pumping power is 8.2kW and the pulse-wi

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45

Zuo, Zongyan, Changjin Ou, Yongjie Ding, et al. "Spiro-substitution effect of terfluorenes on amplified spontaneous emission and lasing behaviors." Journal of Materials Chemistry C 6, no. 16 (2018): 4501–7. http://dx.doi.org/10.1039/c8tc00714d.

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46

Li, Xin, Zhe Zhang, Xinyang Xu, Junjie Liu, and Xiaolei Bai. "1.73 kW CW Amplification ASE Source Based on Yb3+ Ions-Doped All-Fiber System." Photonics 10, no. 1 (2023): 81. http://dx.doi.org/10.3390/photonics10010081.

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The all-fiber ASE source is an intriguing tool in the fields of super-fluorescence detection, coherent measurement and spectrum analysis technology. We experimentally demonstrate a continuous all-fiber amplified spontaneous emission (ASE) source based on amaster-oscillator power amplifier (MOPA) system, which aims at achieving high power and frequency stability. The seed source is homemade ASE low power super-fluorescence source with 200 mW. The system employs large-mode-area Yb3+-doped double-clad fiber (LMA-DCF), and the maximum power can reach 1.73 kW at a center wavelength of 1079.36 nm, a

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47

Sultana, Nasrin, and Abubakar Siddik. "Characterization of Visible Range Gain in Praseodymium Doped Fiber Amplifier." International Journal of Research and Review 11, no. 1 (2024): 140–46. http://dx.doi.org/10.52403/ijrr.20240115.

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In the optical (380-700 nm) region, a simulation study was conducted to assess the low-signal gain, power conversion efficiency (PCE), and optical output power of a praseodymium-doped fiber optic amplifier (PDFA). The PDFA performance was assessed using the optimized Pr3+ fiber length, Pr3+ ion concentration, and pump power. Additionally, the effects of input signal voltage and amplifier gain on amplified spontaneous emission (ASE) were investigated. A lower peak signal of roughly 1 dB at 635 nm was obtained with a shorter 5 m Pr3 + doped fiber and a higher pump power of 300 mW. The impact of

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48

Milanese, Stefania, Maria Luisa De Giorgi, Luis Cerdán, et al. "Amplified Spontaneous Emission Threshold Dependence on Determination Method in Dye-Doped Polymer and Lead Halide Perovskite Waveguides." Molecules 27, no. 13 (2022): 4261. http://dx.doi.org/10.3390/molecules27134261.

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Nowadays, the search for novel active materials for laser devices is proceeding faster and faster thanks to the development of innovative materials able to combine excellent stimulated emission properties with low-cost synthesis and processing techniques. In this context, amplified spontaneous emission (ASE) properties are typically investigated to characterize the potentiality of a novel material for lasers, and a low ASE threshold is used as the key parameter to select the best candidate. However, several different methods are currently used to define the ASE threshold, hindering meaningful

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49

Yip, R. W., and Y. X. Wen. "Origin of the dual-band laser emission from 7-diethylamino-4-methylcoumarin (C1) in solution: effect of hydrogen-bonding interaction by hydroxylic molecules." Canadian Journal of Chemistry 69, no. 9 (1991): 1413–17. http://dx.doi.org/10.1139/v91-209.

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Ultraviolet absorption measurements on 7-diethylamino-4-methylcoumarin (Cl) and its rigid analogue C102 in which the 7-amino group is structurally prevented from twisting in n-butyl acetate (nBuOAc) solutions containing submolar concentrations of n-butyl alcohol showed weak 2:1 alcohol:dye complexation. These results contrast with those from fluorescence measurements which revealed a 1:1 alcohol:dye excited state complex for the Cl dye. These results together with N2 laser excited amplified spontaneous emission (ASE), and laser gain measurements on Cl and C102 in nBuOAc with alcohol or acetoni

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50

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 ob

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