1. IntroductionFiber laser communication is a communication methodthat uses laser and fiber medium to realize datatransmission and information output [1]. It has theadvantages of low loss, wide transmission frequencyband, large capacity, small volume, light weight, anti-electromagnetic interference, little cross talk, fasttransmission speed, long transmission distance and so on.The most basic optical fiber communication systemconsists of data source, optical transmitter, optical channeland optical receiver. The data source includes all thesignal sources, which are the signals obtained by thevoice, image, data and other services through the sourcecoding. The optical transmitter and modulator areresponsible for transforming the signal into the opticalsignal suitable for transmission on the optical fiber. Theoptical wave Windows used are 0.85μm, 1.31μm and1.55μm successively.