Chah Karima, Yüksel Kivilcim, Kinet Damien, Yazd Nazila Safari, Mégret Patrice, Caucheteur Christophe
Opt Lett. 2019 Aug 15;44(16):4036-4039. doi: 10.1364/OL.44.004036.
Type-I fiber Bragg gratings photo-inscribed in hydrogen-loaded B/Ge co-doped silica single-mode optical fibers have been regenerated efficiently at 450°C, which is the lowest temperature reported so far. The mechanical strength of the annealed fiber is preserved while ensuring temperature sensing of the regenerated gratings up to 900°C. Unlike low temperature cycles (≤600°C), an annealing process at higher temperatures revealed faster regeneration for strong gratings. Changes in grating strength were also measured before the regeneration cycle. These behaviors suggest the contribution of different mechanisms to the regeneration process with different relative dynamics.
在氢加载的硼/锗共掺杂二氧化硅单模光纤中光写入的I型光纤布拉格光栅已在450°C下高效再生，这是迄今为止报道的最低温度。退火光纤的机械强度得以保留，同时确保再生光栅在高达900°C的温度下进行温度传感。与低温循环（≤600°C）不同，在较高温度下的退火过程显示出强光栅的再生速度更快。在再生循环之前还测量了光栅强度的变化。这些行为表明不同机制以不同的相对动力学对再生过程有贡献。
