Title :
Twin-Core Fiber-Based Erbium-Doped Fiber Laser Sensor for Decoupling Measurement of Temperature and Strain
Author :
Zexin Kang ; Jiang Sun ; Yunlong Bai ; Shuisheng Jian
Author_Institution :
Key Lab. of All Opt. Network & Adv. Telecommun. Network, Beijing Jiaotong Univ., Beijing, China
Abstract :
In this paper, a novel all-fiber laser sensing configuration for decoupling measurement of strain and temperature based on the twin-core fiber (TCF) with an in-line embedded fiber Bragg grating (FBG) is proposed and experimentally demonstrated. An erbium doped fiber ring laser is built, with an optical signal-to-noise ratio higher than 40 dB and a power instability of 6.75 μW in 1 h. Due to the different spectrum responses of the TCF and FBG to the uniform variation of strain and temperature, the decoupling measurement for these two measurands could be achieved by real-time monitoring both the center wavelength shift and the peak power variation.
Keywords :
Bragg gratings; erbium; fibre lasers; fibre optic sensors; measurement by laser beam; ring lasers; spectral methods of temperature measurement; strain measurement; strain sensors; temperature sensors; all-fiber laser sensing configuration; decoupling measurement; erbium doped fiber laser sensor; in-line embedded fiber Bragg grating; ring laser; strain measurement; temperature measurement; twin core fiber; Fiber gratings; Optical fiber sensors; Strain; Temperature measurement; Temperature sensors; Decoupling measurement; Fiber Bragg grating (FBG); Fiber-optic sensor; Twin core fiber (TCF); decoupling measurement; fiber Bragg grating (FBG); fiber laser sensor; twin core fiber (TCF);
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2015.2460731
