Large refractive index modulation based on a BDK-doped step-index PMMA optical fiber for highly reflective Bragg grating inscription

被引：14

作者：

Hu, Xuehao ^{[1
,2
]}

Yue, Xiaoyu ^{[1
,2
]}

Cheng, Xin ^{[3
]}

Gao, Shixin ^{[4
]}

Min, Rui ^{[5
]}

Wang, Heng ^{[4
]}

Qu, Hang ^{[1
,2
]}

Tam, Hwa-Yaw ^{[3
]}

机构：

[1] Shantou Univ, Coll Sci, Res Ctr Adv Opt & Photoelect, Dept Phys, Shantou 515063, Guangdong, Peoples R China

[2] Shantou Univ, Key Lab Intelligent Mfg Technol MOE, Shantou 515063, Guangdong, Peoples R China

[3] Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

[4] Shenyang Aerosp Univ, Coll Sci, Shenyang 110136, Peoples R China

[5] Beijing Normal Univ Zhuhai, State Key Lab Cognit Neurosci & Learning, Ctr Cognit & Neuroergon, Zhuhai 519087, Guangdong, Peoples R China

来源：

OPTICS LETTERS | 2021年 / 46卷 / 12期

基金：

中国国家自然科学基金;

关键词：

FEW-MODE; NM; METHACRYLATE); LASER;

D O I：

10.1364/OL.427042

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally report high reflectivity on the poly(methyl methacrylate) (PMMA)-based polymer optical fiber Bragg gratings by means of a 266 nm pulsed laser and phase mask technique. In the first recipe, fiber Bragg gratings (FBGs) were manufactured with a single pulse up to 3.7 mJ. After post-annealing, a stable refractive index change up to 4.2 x 10(-4) was obtained. In the second recipe, FBGs were inscribed by 22 pulses with a lower pulse energy of 1.4 mJ, showing a stable refractive index change of 6.2 x 10(-4). Both behaviors may mainly be attributed to the movement of initiating radicals arising from benzyl dimethyl ketal (BDK) under UV irradiation. The high refractive index change in step-index fibers paves the way to tilted FBG manufacturing with large tilt angles potentially for biomedical applications. (C) 2021 Optical Society of America

引用

页码：2864 / 2867

页数：4

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