Hybrid Fabry-Perot interferometer for simultaneous liquid refractive index and temperature measurement | Zendy

Ben Xu | Zendy; Yi Yang | Zendy; Zhenbao Jia | Zendy; D. N. Wang | Zendy

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Hybrid Fabry-Perot interferometer for simultaneous liquid refractive index and temperature measurement

Author(s) -

Ben Xu,

Yi Yang,

Zhenbao Jia,

D. N. Wang

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.014483

Subject(s) - optics , refractive index , fabry–pérot interferometer , materials science , interferometry , astronomical interferometer , wavelength , fiber optic sensor , optical fiber , sensitivity (control systems) , capillary action , reflection (computer programming) , optoelectronics , physics , electronic engineering , computer science , composite material , programming language , engineering

A compact and high sensitivity sensor with a fiber-tip structure is proposed and demonstrated for simultaneously liquid refractive index (RI) and temperature sensing. The device is fabricated by inserting a tiny segment of capillary tube between single-mode fibers (SMFs) to form two cascaded Fabry-Perot interferometers (FPIs). The theoretical and experimental results demonstrate that the ambient liquid RI and temperature can be simultaneously determined by the intensity and shift of the resonant wavelength in the reflection spectrum. Our proposed device has the highest RI sensitivity of ~216.37 dB/RIU at the RI value of 1.30; a high spatial resolution owing to its compact size (with dimension <400 μm) makes it promising for high precision bio/chemical sensing applications.

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