Title :
Fiber-laser-based wavelength-division multiplexed fiber Bragg grating sensor system
Author :
Youlong Yu ; Luenfu Lui ; Hwayaw Tam ; Wenghong Chung
Author_Institution :
Dept. of Phys., Heilongjiang Univ., China
fDate :
7/1/2001 12:00:00 AM
Abstract :
A wavelength-division-multiplexing technique for interrogating 10-cascaded fiber Bragg grating sensing elements based on a ring-compounded-cavity fiber laser is reported. A feedback control technique was introduced to a tunable Fabry-Perot filter that tracks the wavelength-shift of the sensor. The sensors were demodulated using an unbalanced scanning Michelson interferometer and a sensitivity of 1.682/spl deg//μ/spl epsi/ has been demonstrated.
Keywords :
Bragg gratings; Michelson interferometers; demodulation; fibre lasers; fibre optic sensors; laser cavity resonators; optical tuning; ring lasers; wavelength division multiplexing; cascaded fiber Bragg grating sensing elements; feedback control technique; fiber-laser-based WDM fiber Bragg grating sensor system; ring-compounded-cavity fiber laser; sensitivity; tunable Fabry-Perot filter; unbalanced scanning Michelson interferometer; wavelength-shift; Bragg gratings; Fiber gratings; Fiber lasers; Optical fiber sensors; Optical filters; Optical interferometry; Ring lasers; Sensor systems; Tunable circuits and devices; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
