本文介绍新近研制的0.633μm波段相干光光纤通信系统。该系统采用两个独立的稳频激光器,其中频可在400MHz至2MHz左右任意调谐。系统在70MHz与30MHz中频试通编码信号,实验结果良好。建立这样的系统在国内还是第一次,而中频可谓的相干光光纤通信系统尚未见报道。 This article describes the newly developed 0.633μm band coherent optical fiber communication system. The system uses two independent frequency stabilizing lasers, which can be arbitrarily tuned around 400MHz to 2MHz. System 70MHz and 30MHz IF pass encoding signal, the experimental results are good. The establishment of such a system is the first time in China, but the IF can be described as optical fiber communication system has not been reported.