UV-induced intrinsic Fabry-Perot interferometric sensors and their multiplexing for temperature and strain sensing

Shen, Fabin; Wang, Zhuang; Peng, Wei; Cooper, Kristie; Pickrell, Gary; Wang, Anbo

doi:doi:10.1117/12.658979

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UV-induced intrinsic Fabry-Perot interferometric sensors and their multiplexing for temperature and strain sensing

Proc. SPIE 6174, 61740D (2006); http://dx.doi.org/10.1117/12.658979

Monday 27 February 2006

San Diego, CA, USA

Smart Structures and Materials 2006: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems

Masayoshi Tomizuka, Chung-Bang Yun, Victor Giurgiutiu

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Abstract

Fabin Shen, Zhuang Wang, Wei Peng, Kristie Cooper, Gary Pickrell, and Anbo Wang

Virginia Polytechnic Institute and State Univ.

We present UV-induced intrinsic Fabry-Perot interferometric (IFPI) fiber sensors and a frequency-division-multiplexing (FDM) scheme for quasi-distributed temperature and strain sensing. We present a spectrum-based measurement system with a swept laser source to measure the fringe patterns of IFPI sensors serially arranged along a single fiber. The FDM scheme is based on the multiplexing of sub-carrier frequencies generated by the frequency-modulation of a continuouswave light source. IFPI sensors with different optical path differences (OPD) will have different sub-carrier frequencies. We use band pass filters to select individual frequency component and use frequency-estimation based signal processing algorithms to determine the OPD of each sensor. Experimental results for multiplexed temperature and strain sensing are demonstrated. The performance of the multiplexing system is discussed.

History

Online Apr 05, 2006

Digital Object Identifier

http://dx.doi.org/10.1117/12.658979

Citation

Fabin Shen, Zhuang Wang, Wei Peng, Kristie Cooper, Gary Pickrell and Anbo Wang, "UV-induced intrinsic Fabry-Perot interferometric sensors and their multiplexing for temperature and strain sensing", Proc. SPIE 6174, 61740D (2006); http://dx.doi.org/10.1117/12.658979