二分支低中频相位分集FSK相干光纤通信实验系统

The Experimental Study on Two-Branch Low-IF Phase-Diversity FSK Coherent Optical Fiber Communication System

本文报道以1.5μm InGaAsP自聚焦棒(GRINROD)外腔半导体激光器作发送光源,光棚外腔半导体激光器作本振光源,用改进的90°光混合器作光混合器件的二分支相位分集FSK相干光纤通信系统的实验研究系统中,采用100 MHz正弦信号对自聚焦棒外腔半导体激光器进行直接注入电流调制,接收端用平衡混频器解调信号。实验结果表明,改进的90°光混合器可用于相干光纤通信系统中。

In this paper, the experimental study on two-branch low-IF phase-diversity FSK coherent optical fiber communication system using 1.5μm InGaAsP GRINROD and grating external cavity semiconductor laser, respectively, as transmitter and local oscillator, and improved all-fiber 90° optical hybrid as optical mixing component, is reported. In the experimental system, 100MHz sinusoid signal current is directly injected into GRINROD external cavity semiconductor laser, and is recovered at receiver by square-law detector. The experimental results show that the improved all-fiber 90°?optical hybrid can find applications in coherent optical fiber communication systems.