Analysis and optimization of wide-band flat-gain telluride-based fiber Raman amplifier

Lin Wang; Fengping Yan; Taorong Gong; Yifan Li; Shuisheng Jian

doi:10.1117/12.688595

4 October 2006 Analysis and optimization of wide-band flat-gain telluride-based fiber Raman amplifier

Lin Wang, Fengping Yan, Taorong Gong, Yifan Li, Shuisheng Jian

Proceedings Volume 6351, Passive Components and Fiber-based Devices III; 63512E (2006) https://doi.org/10.1117/12.688595
Event: Asia-Pacific Optical Communications, 2006, Gwangju, South Korea

Abstract

The amplification mechanism of ultra-wide-band telluride-based fiber Raman amplifier (T-FRA) is analyzed by comparing the stimulated Raman scattering (SRS) characteristics of the telluride-based fiber with silica-based fibers. Then a multi-pumping scheme to get a gain-flattened FRA is presented. We calculate the pump power in designing multi-wavelength pumped Raman amplifiers by using some optimal searching method such as genic algorithm and an effective linear multi-steps method based on average power called Adams-Bashforth method is proposed which not only utilizes former multi-steps known information to get higher accuracy but also avoids iterative scatting by using forecasting-correcting policy The search time of genic algorithm is about 8 minutes and the calculation time is 2 to 3 minutes. The optimizing process of six pumps can be completed within 20minutes and the time may increase if we use 'shot' method. Furthermore, a complete computing model is established to optimize the pump wavelength and power allocation with flat net gain and broad bandwidth. As a result, using telluride-based fiber Raman amplifier, the gain over 10dB from 1500nm to 1620nm (C and L band) is obtained and the gain spectra is more flat especially in C band.

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Lin Wang, Fengping Yan, Taorong Gong, Yifan Li, and Shuisheng Jian "Analysis and optimization of wide-band flat-gain telluride-based fiber Raman amplifier", Proc. SPIE 6351, Passive Components and Fiber-based Devices III, 63512E (4 October 2006); https://doi.org/10.1117/12.688595

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KEYWORDS

Fiber amplifiers

Raman spectroscopy

Optical amplifiers

Amplifiers

Silica

Signal attenuation

Raman scattering

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