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Proceedings Paper

Optimal design of multi-stage discrete Raman amplifiers incorporating midway isolators
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Paper Abstract

Multi-stage discrete Raman amplifiers with midway isolators to suppress double Rayleigh backscattering (DRB) are fully investigated at constant nonlinearity. The results show that placing Raman pumps at the last stage only is sufficient. For most conditions, two isolators can achieve adequate performance improvement, while more isolators only lead to slightly OSNR increase. The optimum positions of the isolators are insensitive to varied Raman gains, nonlinear phase shifts and Rayleigh coefficients, but sensitive to different fiber lengths as well as Raman pumping schemes. Moreover, backward pumping scheme can derive better noise performance than bi-directional pumping when using midway isolators.

Paper Details

Date Published: 1 December 2005
PDF: 6 pages
Proc. SPIE 6019, Passive Components and Fiber-based Devices II, 60190D (1 December 2005); doi: 10.1117/12.635435
Show Author Affiliations
Zhi Tong, Beijing Jiaotong Univ. (China)
Huai Wei, Beijing Jiaotong Univ. (China)
Shuisheng Jian, Beijing Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 6019:
Passive Components and Fiber-based Devices II
Yan Sun; Jianping Chen; Sang Bae Lee; Ian H. White, Editor(s)

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