Lu Kai, Yang Hangzhou, Lim Kok-Sing, Ahmad Harith, Zhang Pan, Tian Qin, Ding Xiangzi, Qiao Xueguang
Appl Opt. 2018 Aug 20;57(24):6971-6975. doi: 10.1364/AO.57.006971.
In this work, we demonstrate the thermal regeneration of fiber Bragg gratings written in the hydrogenated standard communication optical fibers by two annealing processes. The first annealing process is done at an intermediate temperature (500°C, 700°C, and 900°C) for a specific period of time before cooling down to room temperature. The second annealing is at 1000°C in which the thermal regeneration is attained. The experimental results show that the regenerated gratings that are preannealed at 700°C have charted a reflectivity larger than 65%. They have higher thermal stability compared to that of the standard annealing process. Meanwhile the difference in temperature sensitivity is very small. The temperature sensitivities of regenerated gratings, which have undergone only two annealing processes, are 16.1 pm/°C and 15.8 pm/°C, respectively.
在这项工作中，我们展示了通过两种退火工艺对写入氢化标准通信光纤中的光纤布拉格光栅进行热再生。第一种退火工艺是在中间温度（500°C、700°C和900°C）下进行特定时间段，然后冷却至室温。第二次退火是在1000°C进行，从而实现热再生。实验结果表明，在700°C预退火的再生光栅反射率超过65%。与标准退火工艺相比，它们具有更高的热稳定性。同时，温度敏感性差异非常小。仅经过两次退火工艺的再生光栅的温度敏感性分别为16.1 pm/°C和15.8 pm/°C。
