Femtosecond laser direct written fiber Bragg gratings with narrow bandwidth and high sideband suppression

被引：3

作者：

Qiu, Wenping ^{[1
]}

Liu, Shuang ^{[1
]}

Cheng, Guanghua ^{[2
]}

Zhan, Huan ^{[3
]}

Zhang, Guodong ^{[2
]}

Ren, Guanpin ^{[1
]}

Sun, Zhongrui ^{[1
]}

Zhang, Min ^{[1
]}

机构：

[1] Chengdu Univ Technol, Coll Math & Phys, Dept Appl Phys, Chengdu 610059, Peoples R China

[2] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710072, Peoples R China

[3] Chengdu Dev Ctr Sci & Technol CAEP, Chengdu 610299, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2024年 / 22卷 / 01期

关键词：

femtosecond laser processing; fiber Bragg grating; slit beam shaping; BY-POINT INSCRIPTION; WAVE-GUIDES; PHOTOSENSITIVITY; FABRICATION;

D O I：

10.3788/COL202422.010501

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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.

引用

页数：7

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