【摘要】 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）通信的原因更多还原

【Abstract】 The new trend and development about fiber gratings for optical fiber communication system are introdnced.It is pointed out that Bragg gratings have been produced in optical fibers by exposing the core,througth the side of the cladding,to a coherent UVtwo beam interference pattern,near 244 nm.The cause of fabricating of fiber gratings is analysed.Because fiber gratngs are highly reflective,they can function as mirrors with frequency dependent reflectivities.It is systematically discussed that fiber gratings are used in optical communication system from source to optical amplifiers,receivers,wavelength division multiplexed(WDM) and soliton transmission systems.更多还原