Optically tunable chirped fiber Bragg grating

被引：13

作者：

Li, Zhen ^{[1
,2
]}

Chen, Zhe ^{[2
,4
]}

Hsiao, V. K. S. ^{[3
]}

Tang, Jie-Yuan ^{[2
]}

Zhao, Fuli ^{[1
]}

Jiang, Shao-Ji ^{[1
]}

机构：

[1] Zhongshan Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China

[2] Jinan Univ, Dept Optoelect Engn, Guangzhou 510632, Guangdong, Peoples R China

[3] Natl Chi Nan Univ, Dept Appl Mat & Optoelect Engn, Nantou 54561, Taiwan

[4] Jinan Univ, Key Lab Optoelect Informat & Sensing Technol, Guangdong Higher Educ Inst, Guangzhou 510632, Guangdong, Peoples R China

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 10期

基金：

中国国家自然科学基金;

关键词：

CHOLESTERIC LIQUID-CRYSTALS; FIXED CENTER WAVELENGTH; DISPERSION COMPENSATOR; PHOTOSENSITIVE FIBER; FILTER; MODULATION;

D O I：

10.1364/OE.20.010827

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This work presents an optically tunable chirped fiber Bragg grating (CFBG). The CFBG is obtained by a side-polished fiber Bragg grating (SPFBG) whose thickness of the residual cladding layer in the polished area (DRC) varies with position along the length of the grating, which is coated with a photoresponsive liquid crystal (LC) overlay. The reflection spectrum of the CFBG is tuned by refractive index (RI) modulation, which comes from the phase transition of the overlaid photoresponsive LC under ultraviolet (UV) light irradiation. The broadening in the reflection spectrum and corresponding shift in the central wavelength are observed with UV light irradiation density of 0.64mW/mm(2). During the phase transition of the photoresponsive LC, the RI increase of the overlaid LC leads to the change of the CFBG reflection spectrum and the change is reversible and repeatable. The optically tunable CFBGs have potential use in optical DWDM system and an all-fiber telecommunication system. (C) 2012 Optical Society of America

引用

页码：10827 / 10832

页数：6

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