Liu, Weilin, Li, Ming, Wang, Chao, Yao, Jianping (2011) Real-Time Interrogation of a Linearly Chirped Fiber Bragg Grating Sensor Based on Chirped Pulse Compression With Improved Resolution and Signal-to-Noise Ratio. Journal of Lightwave Technology, 29 (9). pp. 1239-1247. ISSN 0733-8724. (doi:10.1109/JLT.2011.2123081) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:35705)
The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
Official URL: http://dx.doi.org/10.1109/JLT.2011.2123081 |
Abstract
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A novel approach to interrogating in real time a linearly chirped fiber Bragg grating (LCFBG) sensor based on spectral-shaping and wavelength-to-time (SS-WTT) mapping with improved interrogation resolution and signal-to-noise (SNR) ratio is proposed and experimentally demonstrated. The proposed system consists of a mode-locked laser source, an optical interferometer incorporating an LCFBG, and a dispersive element. The optical interferometer has a spectral response with an increasing free spectral range (FSR). The incorporation of the LCFBG in the interferometer would encode the sensing information in the spectral response as a change in the FSR. After SS-WTT mapping, a linearly chirped microwave waveform is obtained. The correlation of the linearly chirped microwave waveform with a chirped reference waveform would provide a sharp correlation peak with its position indicating the wavelength shift of the LCFBG. A theoretical analysis is carried out, which is validated by a numerical simulation and an experiment. The experimental results show that the proposed system can provide an interrogation resolution as high as 0.25 ?? at a speed of 48.6 MHz.
Item Type: | Article |
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DOI/Identification number: | 10.1109/JLT.2011.2123081 |
Subjects: | T Technology |
Divisions: | Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts |
Depositing User: | Tina Thompson |
Date Deposited: | 28 Oct 2013 12:52 UTC |
Last Modified: | 16 Nov 2021 10:12 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/35705 (The current URI for this page, for reference purposes) |
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