相干通信系统中激光线宽与放大器个数问题

摘要

In coherent optical communication system,the effect of Costas loop in homodyne detection system on phase errors of the entire system was theoretically studied.The impact of receiver sensitivity,power splitting ratio,the num-ber of erbium-doped fiber amplifiers on laser line-width was analyzed.When the bit rate and bit error rate reached certain conditions,the relationships between laser line-width and the receiver sensitivity,the power split ratio,the number of the erbium-doped fiber amplifier were obtained through simulation,which provide certain reference for laser line-width control.%针对相干光通信系统中的零差探测系统中的科斯塔斯环对整个系统的相位误差影响问题进行了深入的理论研究。论文分析了接收机的灵敏度、功率分光比、掺铒光纤放大器的个数对激光器线宽的影响。在设定条件下，利用仿真得到了在比特率和误码率一定的条件下，激光器线宽与接收机的灵敏度、功率分光比、掺铒光纤放大器的个数之间的关系，对系统中激光器线宽控制有一定的参考作用。