Abstract

We propose an ultra-compact full-angle-range direction-distinguishable tilt sensor based on a polymer column working as a Fabry–Perot (FP) microcavity fixed between two sections of single-mode fibers (SMFs). The directional tilt angle from −90 deg to +90 deg can be demodulated by monitoring the wavelength shift of interference fringe, based on the deformation of the polymer column under the effect of the gravity force. The sensitivity of the sensor can be adjusted by changing the shape and size of the polymer column that is fabricated by the single beam illumination with high efficiency and low cost. The sensor can satisfy the engineering requirements owing to its small size, flexible structure, cost-effective performance, large measurement range, and direction-distinguishable ability.

Ultrasensitive fiber tilt sensor based on a mobile inscribed microbubble along the arc-shaped inwall of the microcavity

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Laser-induced suspension of a microbubble in a liquid-filled fiber microcavity for large-range tilt sensing

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Asymmetrical dual tapered fiber Mach-Zehnder interferometer for fiber-optic directional tilt sensor

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Compact optical fiber temperature sensor with high sensitivity based on liquid-filled silica capillary tube

Yu Mao, Yuxi Zhang, Ruikai Xue, Yi Liu, Kunjian Cao, and Shiliang Qu
Appl. Opt. 57(5) 1061-1066 (2018)