Title :
Fast FBG sensor interrogation system using vertical cavity surface emitting laser source
Author :
Huang, Y.H. ; Lu, Chao ; Wai, P.K.A. ; Tam, H.Y.
Author_Institution :
Dept. Of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong, China
Abstract :
This paper presents a FBG sensor interrogation system utilizing VCSEL laser as the light source. Using saw tooth signal to drive the VCSEL input current, a continuous spectrum tuning range of 2 nm can be obtained. Relationship between wavelength tuning range and scanning speed of the VCSEL is studied. TDM method is applied to increase the number of sensors in the system.
Keywords :
Bragg gratings; fibre optic sensors; surface emitting lasers; time division multiplexing; FBG sensor interrogation system; continuous spec; fiber Bragg gratings; saw tooth signal; scanning speed; trum tuning range; vertical cavity surface emitting laser source; wavelength tuning range; Fiber lasers; Laser tuning; Optical fiber sensors; Optical tuning; Ring lasers; Sensor systems; Surface emitting lasers; Teeth; Tunable circuits and devices; Vertical cavity surface emitting lasers;
Conference_Titel :
OptoElectronics and Communications Conference, 2009. OECC 2009. 14th
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-4102-0
Electronic_ISBN :
978-1-4244-4103-7
DOI :
10.1109/OECC.2009.5218136
