Title :
Wavelength Detection of Coherence-Multiplexed Fiber-Optic Sensors Based on Long-Period Grating Pairs
Author :
Guan, Zu-Guang ; Zhang, A. Ping ; Liao, Ran ; He, Sailing
Author_Institution :
Joint Res. Centre of Photonics, Zhejiang Univ., Hangzhou
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
Keywords :
diffraction gratings; fast Fourier transforms; fibre optic sensors; reflectometry; temperature measurement; FFT; fast Fourier transformation; long-period grating pairs; low-coherence reflectometry; multiplexed fiber-optic sensors; multiplexed sensors; spectral responses; spectrum reconstruction; sub-reflectograms; wavelength detection; Fiber gratings; Interference; Monitoring; Optical fiber sensors; Optical interferometry; Optical sensors; Reflectometry; Temperature measurement; Temperature sensors; Wavelength measurement; Long-period grating pair; low-coherence reflectometry; multiplexed sensors; spectrum reconstruction;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2006.887929
