30 April 2004 Optimal designing of broadband gain flatness with multiwavelength-pumped Raman amplifiers
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Proceedings Volume 5279, Optical Fibers and Passive Components; (2004) https://doi.org/10.1117/12.521661
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
Abstract
In this paper, we present a new numerical method for calculating pump power in designing multi-wavelength pumped Raman amplifiers, by using some optimal searching method, we establish a complete computing model to optimize the pump wavelength and power allocation with flat net gain and broad bandwidth. In order to increase precision and degrade computing time a new predictor-corrector linear multistep method is proposed instead of one-step method, which was adopted in traditional designing to calculate power integral for signals and pumps propagating through the fiber. Further more, we adopt the Quasi-Newton iteration method to adjust the pump power efficiently without any manual adjustment. The optimal results show that by using our method, iteration process will be convergent rapidly and relative gain flatness below 5% can be achieved over 100nm bandwidth without any gain equalization devices. The whole optimal method costs within 10 minutes in a common computer.
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Jianbo Wu, Fangping Yan, Lili Zhao, Weiwei Xue, Shuisheng Jian, "Optimal designing of broadband gain flatness with multiwavelength-pumped Raman amplifiers", Proc. SPIE 5279, Optical Fibers and Passive Components, (30 April 2004); doi: 10.1117/12.521661; https://doi.org/10.1117/12.521661
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