Mid-infrared microfiber Bragg gratings

被引：6

作者：

Cai, Dawei ^{[1
]}

Xie, Yu ^{[1
]}

Wang, Pan ^{[1
]}

Zhang, Lei ^{[1
,2
]}

Guo, Xin ^{[1
]}

Tong, Limin ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China

[2] Zhejiang Lab, Res Ctr Intelligent Sensing, Hangzhou 311121, Peoples R China

来源：

OPTICS LETTERS | 2020年 / 45卷 / 22期

基金：

中国国家自然科学基金;

关键词：

We report mid-infrared (mid-IR) Bragg gratings fabricated on sub-wavelength-diameter chalcogenide glass (ChG) microfibers. ChG microfibers with diameters around 3 µm are tapered drawn from As2S3 glass fibers; and the mid-IR microfiber Bragg gratings (mFBGs) are inscribed on microfibers using interference patterns of near bandgap light at a 532 nm wavelength. At a wavelength of about 4.5 µm; the mFBG has an extinction ratio of 15 dB and a positive photo-induced refractive index change of 2 × 10−2. The dependence of the grating formation on accumulated influence of exposure power density and time is investigated. The mid-IR mFBGs demonstrated here may be used as building blocks for micro-photonic circuits or devices in the mid-IR spectral range. © 2020 Optical Society of America;

D O I：

10.1364/OL.403893

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report mid-infrared (mid-IR) Bragg gratings fabricated on sub-wavelength-diameter chalcogenide glass (ChG) microfibers. ChG microfibers with diameters around 3 mu m are tapered drawn from As2S3 glass fibers, and the mid-IR microfiber Bragg gratings (mFBGs) are inscribed on microfibers using interference patterns of near bandgap light at a 532 nm wavelength. At a wavelength of about 4.5 mu m, the mFBG has an extinction ratio of 15 dB and a positive photo-induced refractive index change of 2 x 10(-2). The dependence of the grating formation on accumulated. influence of exposure power density and time is investigated. The mid-IR mFBGs demonstrated here may be used as building blocks for micro-photonic circuits or devices in the mid-IR spectral range. (C) 2020 Optical Society of America

引用

页码：6114 / 6117

页数：4

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