The application of subcarrier multiplexing techniques to coherent lightwave systems designed for video transmission is described. The theory of the intrinsic receiver sensitivity of multichannel coherent SCM (subcarrier multiplexing) systems is presented. Specific implementations of SCM coherent systems transmitting 60 FM video channels and 20 100 Mb/s FSK (frequency shift keying) channels are described. It is shown that a simple phase noise canceling circuit can be implemented, which allows these systems to be built with wide-linewidth DFB (distributed feedback) lasers. Several applications of multichannel coherent SCM systems to video distribution networks are proposed.
展开▼
机译:描述了子载波复用技术在为视频传输设计的相干光波系统中的应用。提出了多信道相干SCM(子载波复用)系统的固有接收机灵敏度理论。描述了发送60个FM视频频道和20100 Mb / s FSK(频移键控)频道的SCM相干系统的特定实现。结果表明,可以实现一个简单的相位噪声消除电路,该电路可以用宽线宽DFB(分布式反馈)激光器构建这些系统。提出了多通道相干SCM系统在视频分配网络中的几种应用。
展开▼