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《Study On Communications》 2004-01
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Research of the performance of forward-pumped Raman fiber amplifier

XIN Xiang-jun~1,YU Chong-xiu~1,REN Jian-hua~1,LI An-jian~1,WU Qiang~1,WANG Chuan-lin~1, XIN Yu~1,ZHENG Wen-xiao~1,RUAN Shuang-chen~2, DU Ge-guo~2,XIN Gang~3, YANG Xiao-qiang~3 (1.Electronic Engineering School, Beijing University of Posts and Telecommunications,Beijing 100876,China; 2.College of Engineering and Technology, Shenzhen University,Shenzhen 518060,China; 3.Beijing Shunlian Software Science and Technology Co.,Ltd.,Beijing 100044,China)  
Dual wavelengths and three wavelengths forward-pumped Raman fiber amplifiers were realized. Twenty channels in the C band ranging from 1 537.377 to 1 560.605 nm on the ITU-T grid were used as the incident signals of DRA. 100 km and 75 km transmission links were adopted respectively. The gain ripple of three wavelengths pumping configuration is below 1.47 dB and the lowest OSNR is 32.5 dB, which is better than that of backward pumping configuration. The gain saturation was experimentally studied in detail. The experimental result showed that the increment of gain would decrease the saturation power of signals and the gain saturation phenomena would be strengthened by the increased gain. The saturation power of two wavelengths pumped RFA was about 5 dBm.
【Fund】: 国家自然科学基金资助项目(60132040);; 广东省自然科学基金资助项目(011736).
【CateGory Index】: TN722.32
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