分别采用800 nm 飞秒激光、244 nm 氩离子激光，基于相位掩模板法在载氢和非载氢光纤上制备了飞秒载氢、非载氢布拉格光栅及紫外载氢光纤布拉格光栅。对制作的3 种光栅进行高温热处理实验，均观察到光栅再生现象。对比了不同热处理温度下的光栅再生时间，建立了光栅再生过程模型以及处理温度-再生时间模型，并定义了光栅再生处理温度阈值。实验和模型研究表明，刻写的飞秒非载氢光栅、飞秒载氢光栅及紫外载氢光栅的再生处理温度阈值分别为888 ℃、780 ℃和770 ℃。载氢再生光栅在高温下有衰退现象，飞秒非载氢再生光栅具有良好的温度稳定性。

Fiber Bragg gratings (FBGs) are inscribed in both H₂-loaded and H₂-free fiber using 800 nm femtosecond laser, 244 nm Ar⁺ laser and a phase mask. The regeneration of three kinds of FBGs is observed in different processing temperatures. The models of regeneration process as well as regeneration temperature versus time are established. The FBGs regeneration temperature thresholds are defined. Experimental results and model analysis show that the regeneration temperature thresholds of femtosecond FBG written in H₂-free fiber, femtosecond FBG written in H₂- free fiber and ultraviolet (UV) FBG in H₂- loaded fiber are around 888 ℃ , 780 ℃ and 770 ℃ , respectively. The regenerated FBGs in H₂-loaded fiber decay in case of high temperature, while regenerated femtosecond FBG in H₂-free fiber has well temperature stability.