Title :
A Bragg grating-tuned fiber laser strain sensor system
Author :
Melle, Serge M. ; Alavie, A. Tino ; Karr, Shawn ; Coroy, Trent ; Liu, Kexing ; Measures, Raymond M.
Author_Institution :
Inst. for Aerosp. Studies, Toronto Univ., Downsview, Ont., Canada
Abstract :
The development of a fiber laser sensor system which permits efficient interrogation of Bragg grating sensors is reported. A tunable erbium doped fiber laser which utilizes a broadband mirror and an intracore Bragg grating reflector in side-pump configuration is described. The wavelength of the laser oscillation is determined by the Bragg grating, which is remotely located and used as a strain sensor. This arrangement is used in conjunction with a passive wavelength demodulation system (WDS) to form a self-contained fiber laser strain sensor system, allowing efficient interrogation of the Bragg sensor. This device provides interrupt-immune sensing of static and dynamic strains with a bandwidth of 13.0 kHz.<>
Keywords :
diffraction gratings; erbium; fibre lasers; fibre optic sensors; laser tuning; strain gauges; 13.0 kHz; Bragg grating sensors; Bragg grating-tuned fiber laser strain sensor system; Er-doped fibre lasers; broadband mirror; dynamic strains; interrupt-immune sensing; intracore Bragg grating reflector; laser accessories; laser oscillation; optical pumping; passive wavelength demodulation system; self-contained; side-pump configuration; static strains; strain sensor; tunable erbium doped fiber laser; Bragg gratings; Capacitive sensors; Erbium; Erbium-doped fiber lasers; Fiber gratings; Fiber lasers; Mirrors; Optical fiber sensors; Sensor systems; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
