Novel Fabry-Perot fiber optic sensor with multiple applications

Xiaopei Chen; Fabin Shen; Anbo Wang; Zhuang Wang; Yan Zhang

doi:10.1117/12.581014

8 December 2004 Novel Fabry-Perot fiber optic sensor with multiple applications

Xiaopei Chen, Fabin Shen, Anbo Wang, Zhuang Wang, Yan Zhang

Proceedings Volume 5590, Sensors for Harsh Environments; (2004) https://doi.org/10.1117/12.581014
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

A novel Intrinsic Fabry-Perot fiber-optic sensor is presented in this paper. The sensors were made through two simple steps: wet chemical etch and fusion splice. Micro air-gaps were generated inside the fibers and functioned as reflective mirrors. This procedure not only provides a simple and cost effective technology for fabricating intrinsic Fabry-Perot Interferometric (IFPI) fiber sensors, but also provides two possible IFPI structures. Both of the fiber cavity between the air-gaps or the air-gap and cleaved fiber end can be used as sensing elements. With these two structures, this sensor can be used to measure the temperature, strain, pressure, refractive index of chemicals and the thin film thickness by itself. Multi-point measurements can also be achieved by multiplexing. Furthermore, it also can be multiplexed with other sensors such as Long Period Gratings (LPG) to provide compensations for other perturbation sensing. Theoretical and experimental studies of two sensor structures are described. Experimental results show that high resolution and high sensitivity can be obtained with appropriate signal processing.

Citation Download Citation

Xiaopei Chen, Fabin Shen, Anbo Wang, Zhuang Wang, and Yan Zhang "Novel Fabry-Perot fiber optic sensor with multiple applications", Proc. SPIE 5590, Sensors for Harsh Environments, (8 December 2004); https://doi.org/10.1117/12.581014

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