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Experimental research on single-frequency fiber Raman amplifier

Xu Jiang-Ming Leng Jin-Yong Han Kai Zhou Pu Hou Jing

Experimental research on single-frequency fiber Raman amplifier

Xu Jiang-Ming, Leng Jin-Yong, Han Kai, Zhou Pu, Hou Jing
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  • PDF Downloads:  714
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Publishing process
  • Received Date:  31 May 2011
  • Accepted Date:  05 April 2012
  • Published Online:  05 April 2012

Experimental research on single-frequency fiber Raman amplifier

  • 1. College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos.61077076, 10904173, 11004247), and the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No.NCET-08-142).

Abstract: Single-frequency fiber Raman amplifier (SF-FRA) is known for the ability of all-band amplification, and it is very attractive for the amplification of single-frequency seed light at a special wavelength, such as 1178nm and 1271nm. The 1080nm single-frequency signal light is amplified by a 1031nm pump source, and the influences of seed power of single-frequency signal light, length of Raman gain fiber, pump scheme are experimentally investigated. The results show that the efficiency of SF-FRA increases with the enhancement of the single-frequency signal power and the length of Raman gain fiber. The efficiency of co-pump SF-FRA is higher than that of the counter-pump SF-FRA. The measure ments show that the linewidth of single-frequency signal light is not broadened obviously in the process of Raman amplification. The visibilities of the rapid-exposure pattern of far-field interference of single-frequency seed light and the amplified light are 0.814 and 0.719, respectively. The results show that the coherence of single-frequency signal light is affected by the SF-FRA more or less. These experimental results can provide a reference for designing other special wavelength SF-FRA.

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