Title :
Temperature-Independent and Strain-Independent Twist Sensor Based on Structured PM-CFBG
Author :
Bin Yin ; Haisu Li ; Suchun Feng ; Yunlong Bai ; Zhibo Liu ; Wanjing Peng ; Shuo Liu ; Shuisheng Jian
Author_Institution :
Key Lab. of All Opt. Network & Adv. Telecommun. Network of EMC, Beijing Jiaotong Univ., Beijing, China
Abstract :
In this letter, we present a structured polarization-maintaining chirped fiber Bragg grating (PM-CFBG) for temperature-independent and strain-independent twist measurement. The structured PM-CFBG, which has two transmission peaks, is created by tapering directly on the PM-CFBG. The grating transmissivity of structured PM-CFBG changes linearly with twist while it is insensitive to strain and temperature. The wavelength interval changes proportionally to the temperature, but remains the same as the strain increases. This novel sensor can be used to measure temperature, strain, and twist simultaneously.
Keywords :
Bragg gratings; fibre optic sensors; optical fibre polarisation; strain measurement; temperature measurement; grating transmissivity; strain-independent twist measurement; strain-independent twist sensor; structured PM-CFBG; structured polarization-maintaining chirped fiber Bragg grating; temperature-independent twist measurement; temperature-independent twist sensor; Bragg gratings; Optical fiber polarization; Optical fiber sensors; Strain; Temperature measurement; Temperature sensors; Chirped fiber grating; fiber sensor; twist;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2329315
