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Proceedings Paper

Optimal designing of broadband gain flatness with multiwavelength-pumped Raman amplifiers
Author(s): Jianbo Wu; Fangping Yan; Lili Zhao; Weiwei Xue; Shuisheng Jian
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Paper 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.

Paper Details

Date Published: 30 April 2004
PDF: 7 pages
Proc. SPIE 5279, Optical Fibers and Passive Components, (30 April 2004); doi: 10.1117/12.521661
Show Author Affiliations
Jianbo Wu, Northern Jiaotong Univ. (China)
Fangping Yan, Northern Jiaotong Univ. (China)
Lili Zhao, Northern Jiaotong Univ. (China)
Weiwei Xue, Northern Jiaotong Univ. (China)
Shuisheng Jian, Northern Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 5279:
Optical Fibers and Passive Components
Steven Shen; Shuisheng Jian; Katsunari Okamoto; Kenneth L. Walker, Editor(s)

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