本文介绍光的相干性概念，其中包括空间相干性、时间相干性和复相干函数。
This paper presents coherence concepts including time coherence, spatial coherence and complex correlation function.
阐述了信号光与串扰光的物理相干性与信号数字逻辑相关性问题。
The problem of physical coherence and digital logical correlation is stated in detail.
本文给出了描述光场相干性的基本物理量，从迈克尔逊干涉实验出发，讨论了时间相干性；
This paper first introduces basic physical quantity of coherence and discusses temporal coherence starting from Michael interfering experiment.
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