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本文改进了一种实现长距离自适应补偿光纤传输的方法.在利用光纤光栅形成的谐振腔产生激光对信号光进行拉曼放大的基础上,再利用双抽运光对信号光进行拉曼放大,从而获得更高的拉曼增益以实现更长距离的自适应补偿光纤传输.使实验自适应补偿传输距离达125km(为目前国际上已报道的最长自适应补偿光纤传输距离).实验测量并理论分析了该长距离光纤传输系统的开关增益、放大的自发辐射噪声、噪声指数和光功率分布的特性,实验结果与理论模型符合很好.
In this paper, we improve a method to realize long-distance self-adaptive compensation of optical fiber transmission.On the basis of Raman amplification of the signal light by the laser resonator formed by the fiber grating and the signal light Raman amplification by double pumping light , So as to obtain higher Raman gain to achieve longer distance adaptive compensated optical fiber transmission.Experimental adaptive compensating transmission distance up to 125km (the longest self-adaptive compensating optical fiber transmission distance reported in the world at present) .Experimental measurement The characteristics of switching gain, amplified spontaneous emission noise, noise index and optical power distribution of the long-distance optical fiber transmission system are theoretically analyzed. The experimental results are in good agreement with the theoretical model.