TY - GEN
T1 - Demodulation of a fiber Bragg grating sensor system based on a linear cavity multi-wavelength fiber laser
AU - Cong, Shan
AU - Sun, Yunxu
AU - Pan, Lifeng
AU - Fang, Yating
AU - Tian, Jiajun
AU - Yang, Yanfu
AU - Yong, Yao
PY - 2011
Y1 - 2011
N2 - A fiber Bragg grating (FBG) sensor demodulation scheme based on a multi-wavelength erbium-doped fiber laser (EDFL) with linear cavity configuration is presented and demonstrated. The scheme is one linear fiber laser cavity with two FBG sensors as its filters. One is for strain sensing, and the other one is for temperature compensation. A power-symmetric nonlinear optical loop mirror (NOLM) is utilized in the laser in order to suppress the mode competition and hole-burning effect to lase two wavelengths output that correspond with two FBG sensors. The sensing quantity, which is demodulated by spectrometer, is represented by the output wavelength shift of the EDFL with temperature and strain applying on FBG sensors. In the experiment, strain measurement with a minimize resolution of 0.746, i.e. 0.9pm and adjustable linear sensitivity are achieved. Due to utilizing the linear cavity multi-wavelength EDFL with a NOLM as the light source, the scheme also exhibits important advantages including obviously high signal and noise ratio (SNR) of 40.467dB and low power consuming comparing with common FBG sensors with broadband light as the light source.
AB - A fiber Bragg grating (FBG) sensor demodulation scheme based on a multi-wavelength erbium-doped fiber laser (EDFL) with linear cavity configuration is presented and demonstrated. The scheme is one linear fiber laser cavity with two FBG sensors as its filters. One is for strain sensing, and the other one is for temperature compensation. A power-symmetric nonlinear optical loop mirror (NOLM) is utilized in the laser in order to suppress the mode competition and hole-burning effect to lase two wavelengths output that correspond with two FBG sensors. The sensing quantity, which is demodulated by spectrometer, is represented by the output wavelength shift of the EDFL with temperature and strain applying on FBG sensors. In the experiment, strain measurement with a minimize resolution of 0.746, i.e. 0.9pm and adjustable linear sensitivity are achieved. Due to utilizing the linear cavity multi-wavelength EDFL with a NOLM as the light source, the scheme also exhibits important advantages including obviously high signal and noise ratio (SNR) of 40.467dB and low power consuming comparing with common FBG sensors with broadband light as the light source.
KW - demodulation
KW - fiber Bragg grating (FBG) sensor
KW - multi-wavelength fiber laser
KW - nonlinear optical loop mirror (NOLM)
KW - signal-to-noise ratio (SNR)
UR - https://www.scopus.com/pages/publications/84864105127
M3 - 会议稿件
AN - SCOPUS:84864105127
SN - 9780819489616
T3 - 2011 Asia Communications and Photonics Conference and Exhibition, ACP 2011
BT - 2011 Asia Communications and Photonics Conference and Exhibition, ACP 2011
T2 - 2011 Asia Communications and Photonics Conference and Exhibition, ACP 2011
Y2 - 13 November 2011 through 16 November 2011
ER -