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近来在固体光源和探测器以及低损光纤方面的进展,对于低中带宽信道(从几千赫到1000兆赫)的光通信系统的考虑就容易了。本文探讨光频载波系统用于这样的信道中传输。我们将考虑模拟强度调制,脉位调制,△调制,脉冲编码调制。本文有一定的指导意义。I引言自激光出现以来,由于光频通信系统可能的特大带宽容量,通信工程师们特别感到兴趣。结果,注意力被集中到高容量,高带宽考虑上,近来在元件制造上的进展,例如发光二极营(LED)结型激光器,雪崩光电二极营,以及低损光纤,使我们很容易地考
Recent advances in solid-state light sources and detectors and low loss fibers have made it easy to consider optical communication systems for low to medium bandwidth channels from a few kilohertz to 1000 megahertz. This article discusses the optical carrier system used for such channel transmission. We will consider analog intensity modulation, pulse modulation, delta modulation, pulse code modulation. This article has some guiding significance. I. INTRODUCTION Communication engineers are particularly interested in the possible large bandwidth capacity of optical communications systems since the advent of lasers. As a result, attention is focused on high-capacity, high-bandwidth considerations. Recent advances in component manufacturing, such as LED junction lasers, avalanche photodiode batchers, and low loss fibers, make it easy To test