Combined time- and wavelength-division-multiplexing demodulation technique of fiber grating sensor arrays using a tunable pulsed laser.
Combined time- and wavelength-division-multiplexing demodulation technique of fiber Bragg grating (FBG) sensor arrays using a tunable pulsed laser is proposed and demonstrated. A tunable fiber laser based on a matched FBG is applied. The wavelengths of the sensing FBGs are obtained by detecting the maximum voltages with a photodiode that avoids the complex demodulation process. The advantages of this scheme are simple structure, high signal-to-noise ratio, and the sensing signals obtained by detecting the maximum voltages.
Dong
Bo
B
Institute of Modern Optics, Nankai University, Tianjin, China. db1978@163.com
He
Shiya
S
Hushu
Yang
Y
Tianda
Wei
W
Lvjun
Feng
F
Guo
Tuan
T
Zhao
Qida
Q