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随着光波分复用（WDM）技术的日趋成熟，WDM全光网技术已成为国际上的研究热点本文说明了WDM全光网的基本概念、组成、关键技术、关键器件以及全光同的优点，简要介绍了当今世界上几个主要的WDM全光网的工作，并且对全光网今后的发展方向和趋势作了展望。
With the maturing of optical wavelength division multiplexing (WDM) technology, WDM all-optical network technology has become an international research hotspot This paper describes the basic concepts of WDM all optical network, composition, key technologies, key components and all-optical advantages , Briefly introduced the work of several major WDM all optical networks in the world today, and looked forward to the future development direction and trend of All Optical Network.