摘要
分布式拉曼光纤放大器(DRFA)因其一系列优异特性被广泛应用于现代通信系统中。基于目前DRFA增益控制存在的一些问题,文章研究并改进了通过带外放大自发辐射(ASE)对DRFA进行自动增益控制(AGC)的方法。针对DRFA增益受光纤链路性能影响较大的特点,文章理论分析了光纤链路中距离泵浦源0位置处接头损耗对拉曼增益控制的影响,然后将距离泵浦源不同位置处的接头损耗等效为0处的接头损耗,修正了拉曼增益与带外ASE功率的关系,从而更精确地实现了DRFA的AGC。DRFA模块内部集成了光时域反射仪(OTDR)的功能,用于探测工程光纤链路中接头损耗到泵浦源的距离以及损耗值的大小。经实验验证,文章所提AGC方法能将接头损耗对DRFA增益的影响控制在0.2 dB以内。
Distributed Raman Fiber Amplifier(DRFA)is widely used in modern communication systems because it has a series of excellent features.Considering the existing problems of DRFA gain control,this paper studies and improves a method of Automatic Gain Control(AGC)of DRFA by Amplifying Spontaneous Emission(ASE)out of band.In view of the fact that DRFA gain is greatly affected by the performance of optical fiber link,this paper firstly theoretically analyzes the influence of the joint loss at the position 0 away from the pump source in the optical fiber link on the Raman gain control.Then the splice loss at different positions from the pump source is set to be equivalent to the splice loss at position 0.The relationship between Raman gain and out-of-band ASE power is modified so that the AGC of DRFA can be realized more accurately.The Optical Time Domain Reflectometer(OTDR)function is integrated in the DRFA module to detect the distance between the joint loss and the pump source and the loss value in the engineering optical fiber link.Experimental results show that the proposed AGC method can control the influence of joint loss on DRFA gain within 0.2 dB.
作者
胡杨
付成鹏
陈俊
卜勤练
余春平
HU Yang;FU Cheng-peng;CHEN Jun;BU Qin-lian;YU Chun-ping(Wuhan Research Institute of Posts and Telecommunications,Wuhan 430074,China;Accelink Technologies Co.,Ltd.,Wuhan 430205,China)
出处
《光通信研究》
2022年第4期52-57,共6页
Study on Optical Communications
