Wang Tao, He Da-Wei, Wang Yong-Sheng, Quan Yu, Wang Peng-Fei, Yin Ze-Lin
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2013 May;33(5):1411-4.
Two groups of fiber Bragg gratings were fabricated by using UV laser, and group one was annealed at 850 degrees C 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 degrees C after the process of grating regeneration at 850 degrees C. 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.
采用紫外激光制备了两组光纤布拉格光栅，其中一组在高温炉中于850℃退火。初始光栅消失后发生了光栅再生。对于第一组再生光栅，布拉格波长变化为0.22nm，平均透射强度为2.57dB，而十个光栅之间的透射变化为0.52dB。第二组在850℃进行光栅再生后于1100℃进行后退火。对于第二组再生光栅，布拉格波长变化为0.41nm，平均透射强度为0.69dB，而十个光栅之间的透射变化为0.16dB。后退火光栅的布拉格波长变化明显大于第一组再生光栅，这是由十个光栅之间固定张力的微小差异造成的。光栅再生过程具有良好的可重复性。通过高温退火大规模生产再生光栅是可行的。
