本文介绍了 2 48nm、Kr F准分子激光经过石英相位掩膜版的空间调制 ,在载氢增敏处理过的通信光纤与 B/Ge光纤上分别写入光致折变布拉格光栅的实验研究。经实验测定 ,在光栅布拉格波长上 (λH2 =15 46 .45 5 4nm ,λB/Ge=15 45 .15 5 nm) ,两种光栅反射率均大于 99% ,3d B带宽分别为 0 .12 9nm和 0 .182 nm。经比较 ,B/ Ge光纤比氢载光纤具有更好的光敏性和热稳定性 In this paper, we introduce the experimental study of the spatial modulation of KrF excimer laser through quartz phase mask and the writing of photorefractive Bragg gratings on the hydrogen-sensitized communications fiber and B / Ge fiber respectively. The experimental results show that the reflectivity of the two gratings is more than 99% and the 3dB bandwidth is 0.129 nm at the grating Bragg wavelength (λH2 = 15 46 .45 5 4nm, λB / Ge = 15 45 .15 5 nm) And 0.182 nm. By comparison, B / Ge fiber has better photosensitivity and thermal stability than hydrogen-loaded fiber