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Wavelength Detection of Coherence-Multiplexed Fiber-Optic Sensors Based on Long-Period Grating Pairs

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4 Author(s)
Zu-Guang Guan ; Joint Res. Centre of Photonics, Zhejiang Univ., Hangzhou ; A. Ping Zhang ; Ran Liao ; Sailing He

Multiplexed fiber-optic sensors based on long-period grating pairs (LPGPs) are presented. With a low-coherence reflectometry, the spectral responses of the specially configured LPGP sensors are precisely quantified from the corresponding sub-reflectograms through a fast Fourier transformation (FFT). By monitoring the wavelength shift of the LPGP sensors, temperature is measured experimentally, and good performance is obtained

Published in:

IEEE Sensors Journal  (Volume:7 ,  Issue: 1 )