A fiber-Bragg-grating sensor interrogation system using in-fiber Fabry-Pérot interferometer

Ting-ting Wang; Ming Wang

doi:10.1117/12.910252

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22 November 2011 A fiber-Bragg-grating sensor interrogation system using in-fiber Fabry-Pérot interferometer

Ting-ting Wang, Ming Wang

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Proceedings Volume 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 81991K (2011) https://doi.org/10.1117/12.910252
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

A fiber-Bragg-grating sensor interrogation system using a in-fiber Fabry-Pérot interferometer (IFFPI) is presented. The IFFPI was formed by splicing together a conventional single-mode fiber and a photonic crystal fiber with simple arcdischarge technique. The ellipsoidal air-cavity between the two fibers forms Fabry-Pérot cavity. The diffraction loss can be very low due to the focusing of reentrant and very short cavity length, thus resulting in high visibility and long period. The IFFPI is used as the filter component of the interrogation system. The resolving wavelength can achieve 2pm by using an Er-doped ring FBG laser in the experimental system. The advantages of this system are an all-fiber design, temperature insensitivity, quasistatic and dynamic operation, potential high speed and large range demodulation.

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Ting-ting Wang and Ming Wang "A fiber-Bragg-grating sensor interrogation system using in-fiber Fabry-Pérot interferometer", Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 81991K (22 November 2011); https://doi.org/10.1117/12.910252

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