色散补偿型分布式光纤喇曼放大器的实验研究

在后向抽运和前向抽运方式下,采用光纤喇曼激光器作为抽运源,对S波段色散补偿型光纤喇曼放大器(FRA)进行了实验研究。在增益和噪声特性方面,后向抽运方式优于前向抽运方式。在后向抽运时,测量了5kmDCF-50kmG652光纤色散补偿型分布式FRA,分布式FRA和分立式FRA等三种FRA增益和噪声光谱特性,色散补偿型分布式FRA的增益和噪声特性均优于分布式FRA和分立式FRA。在后向抽运方式下,5kmDCF-50kmG652光纤色散补偿型分布式FRA的抽运功率增大时,其增益增大,噪声指数减小。在抽运功率为1.0W时,当信号功率为0dBm时,最大开关增益为21.4dB,增益光谱大于10dB的带宽超过50nm,噪声指数小于-0.05dB。在同样抽运条件下,色散补偿型FRA的增益与小信号功率无关。

Experimental research on dispersion-compensation distributed fiber Raman amplifier

Under backward pumping and forward pumping conditions, experimental research on FRA (Fiber Raman Amplifier) used for S band dispersion-compensation is carried out by using fiber Raman laser as pumping source. The performance of the backward pumping is better than that of forward pumping in gain and noise features. When backward pumping is applied, the spectra of gain and noise features of dispersion-compensation distributed FRA in 5km DCT-50km G652 optic fiber, distributed FRA in 50km G652 optic fiber and discrete FRA in 5km DCT optic fiber are measured. The gain and noise features of the dispersion-compensation distributed FRA are better than that of distribution FRA and the discrete FRA. Under backward pumping, when pumping power of the fiber dispersion-compensation distributed FRA in 5km DCF- 50km G652 optic fiber increases, its gain increases and noise factor decreases. When pumping power is 1.0W and signal power is 0dBm, the maximal switch gain is 21.4dB. When the gain spectrum is more than 10dB, the bandwidth is more than 50nm and noise factor is less than -0.05dB. Under the same pumping conditions, the gain of the dispersion-compensation FRA is independent of small signal power.