Wavelength Detection of Coherence-Multiplexed Fiber-Optic Sensors Based on Long-Period Grating Pairs |
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| Authors: | Guan Z.-G. Zhang A. P. Liao R. He S. |
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| Affiliation: | Joint Res. Centre of Photonics, Zhejiang Univ., Hangzhou; |
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| Abstract: | 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 |
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