Title :
Improvement of measurement accuracy of FBG sensor systems by use of gas absorption lines as multi-wavelength references
Author :
Chan, C.C. ; Jin, W. ; Ho, H.L. ; Wang, D.N. ; Wang, Y.
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Kowloon, China
Abstract :
We report the use of gas absorption lines as multi-wavelength references to enhance the measurement accuracy of fibre Bragg grating sensors. Experiments with a 3-FBG-sensor array interrogated by a tunable laser demonstrated an overall measurement accuracy of -2 pm.
Keywords :
Bragg gratings; fibre optic sensors; laser tuning; laser variables measurement; light interferometry; measurement standards; absolute wavelengths; curve fitting; differential measurement; fibre Bragg grating sensors; fixed Fabry-Perot interferometer; gas absorption lines; laser tuning; low-cost reference gas cell; measurement accuracy; multiwavelength references; tunable laser interrogation; Absorption; Bragg gratings; Fiber gratings; Fiber lasers; Gas detectors; Gas lasers; Optical arrays; Optical fiber sensors; Sensor systems; Tunable circuits and devices;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO/Pacific Rim 2001. The 4th Pacific Rim Conference on
Conference_Location :
Chiba, Japan
Print_ISBN :
0-7803-6738-3
DOI :
10.1109/CLEOPR.2001.967943
