Center for Optics, Photonics, and Lasers, Université Laval, Québec, Canada.
Opt Lett. 2012 Sep 15;37(18):3900-2. doi: 10.1364/ol.37.003900.
Fiber Bragg gratings (FBG) were written through the polymer jacket of low-loss single mode As(2)S(3) chalcogenide fibers by using femtosecond laser pulses at 800 nm and a phase-mask. Peak reflectivity in excess of 99% was obtained at 3440 nm after 5 min of exposure. The resulting FBG maintained a peak reflectivity of 90% after 64 min of thermal annealing at 100 °C. This demonstration paves the way to the development of all-fiber mid-infrared laser sources.
光纤布拉格光栅（FBG）通过使用 800nm 的飞秒激光脉冲和相位掩模在低损耗单模 As（2）S（3）硫属化物光纤的聚合物护套中写入。在 5 分钟的曝光后，在 3440nm 处获得超过 99%的峰值反射率。经过 100°C 热退火 64 分钟后，所得 FBG 的峰值反射率保持在 90%。这一演示为开发全光纤中红外激光源铺平了道路。
