Hu Xuehao, Woyessa Getinet, Kinet Damien, Janting Jakob, Nielsen Kristian, Bang Ole, Caucheteur Christophe
Opt Lett. 2017 Jun 1;42(11):2209-2212. doi: 10.1364/OL.42.002209.
An endlessly single-mode doped microstructured poly(methyl methacrylate) (PMMA) optical fiber is produced for effective fiber Bragg grating (FBG) photo-inscription by means of a 400 nm femtosecond pulsed laser and the phase mask technique. The fiber presents a uniform benzyl dimethyl ketal (BDK) distribution in its core without drastic loss increase. It was produced using the selected center hole doping technique, and the BDK dopant acts as a photoinitiator. In this Letter, we report a rapidly growing process of the grating reflection band. For an 11 mW mean laser power, the FBG reflectivity reaches 83% in only 40 s.
通过400纳米飞秒脉冲激光和相位掩膜技术，制备了一种用于有效写入光纤布拉格光栅（FBG）的无截止单模掺杂聚甲基丙烯酸甲酯（PMMA）光纤。该光纤纤芯中苄基二甲基缩酮（BDK）分布均匀，且损耗没有急剧增加。它采用选定的中心孔掺杂技术制备，BDK掺杂剂作为光引发剂。在本信函中，我们报道了光栅反射带的快速增长过程。对于11毫瓦的平均激光功率，FBG反射率在仅40秒内就达到了83%。
