Title :
Real-Time Interrogation of a Linearly Chirped Fiber Bragg Grating Sensor for Simultaneous Measurement of Strain and Temperature
Author :
Liu, Weilin ; Li, Wangzhe ; Yao, Jianping
Author_Institution :
Microwave Photonics Res. Lab., Univ. of Ottawa, Ottawa, ON, Canada
Abstract :
We propose and demonstrate a novel approach to real-time interrogation of a high-birefringence linearly chirped fiber Bragg grating (Hi-Bi LCFBG) for simultaneous measurement of strain and temperature based on chirped microwave pulse compression with increased resolution and signal-to-noise ratio (SNR). A theoretical analysis is developed, which is validated by an experiment. The experimental results show that the proposed system can provide a resolution better than ± 1.2 °C and ± 13.3 με at an interrogation speed of 48.6 MHz.
Keywords :
fibre optic sensors; optical pulse compression; strain measurement; temperature measurement; chirped microwave pulse compression; frequency 48.6 MHz; high-birefringence linearly chirped fiber Bragg grating; linearly chirped fiber bragg grating sensor; real-time interrogation; signal-to-noise ratio; strain measurement; temperature measurement; Chirp; Fiber gratings; Strain; Strain measurement; Temperature measurement; Temperature sensors; Chirped fiber Bragg grating (CFBG); chirped microwave pulse; interrogation; sensor; wavelength-to-time mapping;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2160624
