摘要
Aiming for suppressing side-mode and spectrum broadening,a slit beam-shaping method and super-Gaussian apodization processing for femtosecond laser point-by-point(PbP)inscription technology of fiber Bragg gratings(FBGs)are reported here.High-quality FBGs,featuring narrow bandwidth of less than 0.3 nm,high reflectivity above 85%,low insertion loss(0.21 dB),and low cladding loss(0.82 dB),were obtained successfully.By a semi-automatic PbP inscription process,an array consisting of six FBGs,exhibiting almost no side-mode peaks with high suppression ability and narrow bandwidth,was fabricated along three independently developed single-mode fibers with an interval of 20 mm.
作者
邱文平
刘爽
程光华
湛欢
张国栋
任冠品
孙中瑞
张敏
Wenping Qiu;Shuang Liu;Guanghua Cheng;Huan Zhan;Guodong Zhang;Guanpin Ren;Zhongrui Sun;Min Zhang(Department of Applied Physics,College of Mathematics and Physics,Chengdu University of Technology,Chengdu 610059,China;School of Electronics and Information,Northwestern Polytechnical University,Xi’an 710072,China;Chengdu Development Center of Science and Technology of CAEP,Chengdu 610299,China)
基金
supported by the Sichuan Provincial Natural Science Foundation(No.23NSFSC4751)。
