Title :
Multiplexed strain sensor for long-distance remote sensing using fiber grating-tuned fiber laser scheme
Author :
Sungchul Kim ; Hong Yoon ; Sang Bae Lee ; Sang Sam Choi ; Byoungho Lee
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
Aug. 30 1999-Sept. 3 1999
Abstract :
We constructed a fiber laser sensor with two fiber gratings for each sensor array and unidirectional loop cavity. We measured the wavelength shifts of the gratings due to various strains. In spite of the long fiber length of 900 m, high and similar laser power output was obtained. If an interferometric demodulator is used, the sensitivity can be increased, and hence it can be used as a long-distance remote strain sensor system.
Keywords :
demodulators; diffraction gratings; fibre lasers; fibre optic sensors; light interferometers; multiplexing; optical arrays; optical tuning; remote sensing; strain sensors; 900 m; fiber grating-tuned fiber laser scheme; fiber laser sensor; interferometric demodulator; laser power output; long fiber length; long-distance remote sensing; long-distance remote strain sensor system; multiplexed strain sensor; sensitivity; sensor array; two fiber gratings; unidirectional loop cavity; wavelength shifts; Capacitive sensors; Fiber gratings; Fiber lasers; Optical arrays; Optical fiber sensors; Power lasers; Remote sensing; Sensor arrays; Strain measurement; Wavelength measurement;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
DOI :
10.1109/CLEOPR.1999.811435
