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介绍了国外光栅研究的最新进展和光纤光栅被应用于光通信系统中的新动向。阐明了布拉格光栅可以通过位于２４４ｎｍ的二束紫外光（ＵＶ－Ｌａｓｅｒ）从光纤侧面对光纤曝光直接被写入光纤的芯中；分析了光纤光栅产生的原因，并指出光纤光栅具有很高的反射率，可以将这种布拉格光栅做为频率反射镜；还系统地分析了光纤光栅应用于光通信系统中的光源、放大器、波分复用（ＷＤＭ）以及光孤子（Ｓｏｌｉｔｏｎ）通信的原因
The latest progress of foreign grating research and the new trend of the application of fiber grating in optical communication system are introduced. It is shown that the Bragg grating can be directly written into the core of the optical fiber by exposing the optical fiber from the side of the optical fiber by means of two UV-Laser beams at 244 nm. The reason for the generation of the optical fiber grating is analyzed and the fiber grating has a high reflection The Bragg grating can be used as a frequency reflector. The reason why fiber gratings are used in light sources, amplifiers, wavelength division multiplexing (WDM) and soliton communication in optical communication systems is also systematically analyzed