Abstract

We report a novel fiber tilt sensor based on a mobile microbubble inscribed in an ellipsoidal liquid-filled microcavity. When the tilt angle changes, the microbubble in the liquid can drift along the upper arc-shaped inwall of the microcavity and stay at a vertex to get a state of mechanical equilibrium. The drifting microbubble induces a drastic change on the optical path difference between the light beams in the microcavity and, consequently, on the reflection spectrum, which makes it a tilt angle sensitive element. The experimental results show that the tilt angle sensitivity is as high as 160.21 nm/deg, and the detection resolution of such a sensor can reach up to 2.3×103  deg. Moreover, such a fiber tilt sensor is capable of distinguishing the tilt direction, since the movement of the microbubble is tilt direction dependent.

© 2017 Optical Society of America

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Corrections

Kunjian Cao, Yi Liu, and Shiliang Qu, "Ultrasensitive fiber tilt sensor based on a mobile inscribed microbubble along the arc-shaped inwall of the microcavity: publisher’s note," Opt. Lett. 43, 317-317 (2018)
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-43-2-317

12 December 2017: A typographical correction was made to the funding section.


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