Polarization-maintaining fiber-optic-grating vector vibroscope

被引：32
作者：
Guo, Tuan [1 ]
Shang, Libin [1 ]
Liu, Fu [1 ]
Wu, Chuang [1 ,2 ]
Guan, Bai-Ou [1 ]
Tam, Hwa-Yaw [2 ]
Albert, Jacques [3 ]
机构：
[1] Jinan Univ, Inst Photon Technol, Guangzhou 510632, Guangdong, Peoples R China
[2] Hong Kong Polytech Univ, Dept Elect Engn, Photon Res Ctr, Kowloon, Hong Kong, Peoples R China
[3] Carleton Univ, Dept Elect, Ottawa, ON K1S 5B6, Canada
来源：
OPTICS LETTERS | 2013年 / 38卷 / 04期
基金：
加拿大自然科学与工程研究理事会; 中国国家自然科学基金;
关键词：
SENSOR;
D O I：
10.1364/OL.38.000531
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A fiber-optic vector vibroscope based on orthogonal polarization cladding-to-core recoupling is demonstrated. A compact structure in which a short section of polarization-maintained (PM) fiber stub containing a straight fiber Bragg grating (FBG) is spliced to another single-mode fiber. Two well-defined orthogonally polarized cladding modes reflected by the PM-FBG are recoupled at the junction and the coupling intensity shows an extremely high sensitivity to bending in the corresponding orthogonal directions. Both the orientation and amplitude of the vibrations can be determined unambiguously via dual-path power detection of these recoupled orthogonal-polarimetric cladding modes (LP1,12 and LP1,13). Since spectral information is not required, temperature changes do not affect the sensor response, and power fluctuations can be referenced out by monitoring the power in the core mode (LP0,1) resonance. (c) 2013 Optical Society of America
引用
收藏
页码：531 / 533
页数：3
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