论文部分内容阅读
ＦＭ－ＩＭ 模拟信号传输方式的光纤通信系统与直接强度调制、基带模拟传输方式 相比，有明显的优点，其信噪比可提高１．７＋２０１ｏｇβＦＭ（ｄＢ）．本文试图寻求一种适 用于 ＦＭ－ＩＭ光接收机前端的工程设计方法，以便较好地确定光检测器、前置低噪声 放大器的类型及其主要参数．
The optical fiber communication system of FM-IM analog signal transmission has obvious advantages compared with direct intensity modulation and baseband analog transmission, and the signal-to-noise ratio can be increased by 1.7 + 201ogβFM (dB). This article attempts to find a suitable engineering design method for FM-IM optical receiver front-end in order to better determine the type of photodetector, front low-noise amplifier and its main parameters.