光纤通信系统中光发射机的设计

Design on Optical Transmitter in Optical Fiber Communication System

光发射机功能是将AV信号接收、调制后,把电信号变换成光信号,经光纤发射出去。在光纤通信系统的原理下,对光发射机的主要组成部分电源、调频电路及锁相器在原理和实现电路上进行设计,使信号源发出的信号经过光发射机后信号失真小、信噪比高,满足信号传输高质量的要求,实现低成本高质量的AV传输解决方案。

The function of optical transmitter is to translate the electric signals into optical ones after the AV signals being received and modulated and transmit them through the optical source. On the theory of optical fiber communication system,the main parts of optical transmitter which are power supply, frequency modulation circuit and phase -locked loop are designed in theory and realization circuit. After passing through the optical transmitter,the signal which come from signal source could fulfill the requirements of high quality of signal transmission with a smaller distortion and a higher Signal - to - Noise in the new design,This design scheme is a low - cost and good - quality one to AV transmission.