抽运方式对混合拉曼光纤放大器性能的影响  

The Influence of Pumping Configuration in Hybrid Raman Fiber Amplifier on Its Performance

作　　者：忻向军[1] 余重秀[1] 任建华[1] 李安俭[1] 吴强[1] 王传林[1] 郑文潇[1] 阮双琛[2] 杜戈果[2] 杨晓强 辛港 

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]深圳大学工程技术学院,深圳518060 [3]北京瞬联软件科技有限公司,北京100044

出　　处：《光学学报》2003年第11期1311-1314,共4页Acta Optica Sinica

基　　金：广东省自然科学基金 (0 11736 )资助课题

摘　　要：通过实验比较了前向抽运拉曼光纤放大器与掺铒光纤放大器组成的混合放大器、后向抽运拉曼光纤放大器与掺铒光纤放大器组成的混合放大器的性能。实验采用 75km标准单模光纤作为增益介质。采用 2 0信道 (符合ITU T建议的波分复用信号 ) ,波长为 15 37.377～ 15 6 0 .6 0 5nm ,作为混合放大器的测试信号。 2 0信道总功率- 2 .86dBm ,每一信道用 2 .5Gb/s、码长 2 7 1的非归零码通过电吸收调制器 (EA)进行外调制。实验结果表明 ,前向抽运方式混合放大器的性能优于后向抽运方式的混合放大器 ,其中噪声系数的改善值为 2 .2 8～ 6 .5 5dB。采用前向抽运时 ,各信道的增益同后向抽运相比 ,增加值均大于 5dB。但不论采取那种抽运方式 ,采用混合放大的形式 ,各信道的光信噪比均大于 2 6 .9dB。The performance of forward-and backward-pumped Raman fiber amplifier/erbium doped fiber amplifier (EDFA) hybrid amplifiers was experimentally compared. 75 km standard single mode fiber (SSMF) was employed as the transmission line. 20 channels in C-band with a total power of -2.86 dBm, ranging from 1537.377 to 1560.605 nm on the ITU-T grid were used as the incident signals of hybrid amplifiers. Each channel was modulated by an electro-absorption (EA) modulator using a 2.5 Gb/s nonreturn-to-zero (NRZ) format, with a 27-1 long pseudo-random bit sequence (PRBS) signal. Experimental results have suggested some of relative merits of forward-pumped RFA/EDFA hybrid amplifiers. The improvement of noise figure (NF) arranged from 2.24 dB to 6.55 dB. The gain increase was higher than 5 dB for any channel in forward-pumped hybrid amplifiers in comparison with backward-pumped hybrid amplifiers. However, the optical signal-to-noise ratio (OSNR) is higher than 26.9 dB in either pumped configuration for hybrid amplifiers.

关 键 词：抽运方式 拉曼光纤放大器 波导光学 掺铒光纤放大器 混合放大器 信噪比 增益介质 

分 类 号：TN722[电子电信—电路与系统] TN253