Title :
Fiber Ring Laser Sensor for Temperature Measurement
Author :
Yin, Zuowei ; Gao, Liang ; Liu, Shengchun ; Zhang, Liang ; Wu, Feixiang ; Chen, Lin ; Chen, Xiangfei
Author_Institution :
Nat. Lab. of Microstructures, Nanjing Univ., Nanjing, China
Abstract :
A novel multi-longitudinal-mode fiber ring laser temperature sensor based on the beat frequency demodulation technology is presented. The beat frequency between any two modes varies linearly with the temperature. It is experimentally demonstrated that the temperature can be measured with a sensitivity of 10.24 kHz/° C @ 1581.7 MHz between 21° C to 50 ° C, 7.42 kHz/° C @ 1175.6 MHz between 22 °C to 240 °C and 8.48 kHz/° C @ 1480.5 MHz between 100 °C to 1000 °C. This method offers a simple scheme for fiber temperature sensing by employing a low-frequency electrical frequency spectrum analyzer.
Keywords :
fibre lasers; fibre optic sensors; ring lasers; spectral analysers; temperature sensors; beat frequency demodulation technology; fiber temperature sensing; frequency 1175.6 MHz; frequency 1480.5 MHz; frequency 1581.7 MHz; low-frequency electrical frequency spectrum analyzer; multilongitudinal-mode fiber ring laser sensor; temperature 100 degC to 1000 degC; temperature 21 degC to 50 degC; temperature 22 degC to 240 degC; temperature measurement; Fiber lasers; Frequency measurement; Measurement by laser beam; Optical fiber couplers; Optical fiber sensors; Temperature measurement; Temperature sensors; Beat frequency; fiber laser; temperature sensor;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2010.2086046
