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guo wai xiang gan wai cha guang xian tong xin de yan jiu jin zhan
Author(s): 
Pages: 26-29
Year: Issue:  1
Journal: Optical Fiber & Electric Cable and Their Applications

Keyword:  外差光纤通信光纤通信系统研究进展光纤数字通信系统大力发展相干光接收灵敏度直接检测数字通信网半导体激光器;
Abstract: <正> 一、引言随着光纤通信的大规模推广应用,美、日、英、法、德等国家对发展大容量和远距离的光纤通信的兴趣日增。究其原因:其一,由于这些国家都在大力发展综合服务数字通信网(ISDN),需要用光缆来组建ISDN的传输线路;其二,在距离上光纤通信将不仅在城市之问,且将要在跨越大陆和海洋的远程上传输信息。现在普遍使用的光纤数字通信系统是利用PCM/IM和直接检测的方法。这就是发
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