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

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

doi:10.1117/12.658979

5 April 2006 UV-induced intrinsic Fabry-Perot interferometric sensors and their multiplexing for temperature and strain sensing

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

Author Affiliations +

Proceedings Volume 6174, Smart Structures and Materials 2006: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; 61740D (2006) https://doi.org/10.1117/12.658979
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

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.

Citation Download 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, Smart Structures and Materials 2006: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, 61740D (5 April 2006); https://doi.org/10.1117/12.658979

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