Tunable fiber laser based fiber Bragg grating strain sensor demodulation system with enhanced resolution by digital signal processing
✍ Scribed by Binfeng Yun; Yiping Wang; Anmin Li; Yiping Cui
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 168 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A fiber Bragg grating strain sensor demodulation system based on the wavelength‐tunable fiber‐ring laser (WTFRL) is developed. The finite impulse response (FIR) digital filter and the centriod detection algorithm (CDA) are implemented to reduce the system noises and to improve the resolution of the Bragg wavelength‐shifts detection. The experiments show that with this signal processing technique, the resolution of the fiber Bragg grating (FBG) strain sensor is 1.39 με, which is much better than the resolution (10.1 με) of the direct peak‐detection method. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1391–1393, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21638