Title :
A Dual-Wavelength Fiber Laser Sensor System for Measurement of Temperature and Strain
Author :
Liu, Duan ; Ngo, Nam Quoc ; Tjin, Swee Chuan ; Dong, Xinyong
Author_Institution :
Nanyang Technol. Univ., Singapore
Abstract :
A strain and temperature-sensing scheme based on a dual-wavelength fiber laser is demonstrated experimentally. By measuring the change in the wavelength separation of the two lasing wavelengths and the shift of any of two lasing wavelengths, the measured strain and temperature are very linear and have a strain sensitivity of 0.15 pm/muepsiv over a range of 0-2400 muepsiv and a temperature sensitivity of 14.3 pm/degC over a range of 22degC-230degC, respectively.
Keywords :
fibre lasers; fibre optic sensors; measurement by laser beam; strain measurement; strain sensors; temperature measurement; temperature sensors; dual-wavelength fiber laser sensor; lasing wavelengths; strain measurement; strain sensitivity; temperature 22 degC to 230 degC; temperature measurement; wavelength separation; Capacitive sensors; Erbium-doped fiber lasers; Fiber lasers; Optical fiber polarization; Optical fiber sensors; Sensor systems; Strain measurement; Temperature measurement; Temperature sensors; Wavelength measurement; Erbium-doped fiber (EDF); fiber Bragg grating (FBG); fiber-optic sensors; temperature and strain measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.901128
