利用紫外光照射制作两组光纤布拉格光栅, 使用高温炉对第一组光栅进行850 ℃退火处理, 在擦除初始光栅后制备出高温再生光栅, 该组再生光栅的布拉格波长的变化范围为0.22 nm; 平均透射率为2.57 dB, 折射率变化范围为0.52 dB。 对第二组光栅在850 ℃退火处理后进行1 100 ℃后退火, 该组的布拉格波长变化范围为0.41 nm; 平均透射率为0.69 dB, 折射率变化范围为0.16 dB。 后退火处理会放大再生光栅的波长差异, 其原因是退火过程中各光栅固定拉力之间的微小差别。 光纤布拉格光栅从擦除到再生是一个可控的过程, 具有很好的重复性, 通过高温退火法制备再生光栅的大规模生产是可行的。

Two groups of fiber Bragg gratings were fabricated by using UV laser, and group one was annealed at 850 ℃ in the high temperature furnace. Grating regeneration occurred after the initial grating vanished. For the regenerated gratings from group one, the variation in Bragg wavelength is 0.22 nm and the average transmissions strength is 2.57 dB, while the variation of transmission among ten gratings is 0.52 dB. Group two underwent post-annealing at 1 100 ℃ after the process of grating regeneration at 850 ℃. For the regenerated gratings from group two, the variation in Bragg wavelength is 0.41 nm and the average transmissions strength is 0.69 dB, while the variation of transmission among ten gratings is 0.16 dB. The variation in Bragg wavelength of grating with post-annealing is notably larger than that of the regenerated gratings in group one, which is caused by the small difference in fixed tension among the ten gratings. The process of grating regeneration has good reproducibility. The mass production of the regenerated gratings by high temperature annealing is feasible.