Simultaneous directional curvature and temperature sensor based on a tilted few-mode fiber Bragg grating

Zhao, Yunhe, Wang, Changle, Yin, Guolu, Jiang, Biqiang, Zhou, Kaiming, Mou, Chengbo, Liu, Yunqi, Zhang, Lin and Wang, Tingyun (2018). Simultaneous directional curvature and temperature sensor based on a tilted few-mode fiber Bragg grating. Applied Optics, 57 (7), p. 1671.

Abstract

We demonstrate a directional curvature sensor based on tilted few-mode fiber Bragg gratings (FM-FBGs) inscribed by a UV laser. The eigenmodes of LP01LP01 and LP11LP11 mode groups are simulated along with the fiber bending. The directional curvature sensor is based on the LP11LP11 mode resonance in the tilted FM-FBG. For curvature from 4.883 to 7.625  m−17.625  m−1, the curvature sensitivities at direction of 0° and 90° are measured to be −2.67−2.67 and 0.128  dB/m−10.128  dB/m−1, respectively. The temperature variation barely affects the resonance depth of LP11LP11 mode. The proposed curvature sensor clearly demonstrates the potential to simultaneous directional curvature and temperature measurement with the resolutions of 9.15×10−4  m−19.15×10−4  m−1 and 0.952°C, respectively.

Publication DOI: https://doi.org/10.1364/AO.57.001671
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences
Engineering & Applied Sciences > Institute of Photonics
Uncontrolled Keywords: Fiber Bragg gratings,Fiber optics sensors
Full Text Link:
Related URLs: https://www.osapublishing.org/ao/abstract.cfm?uri=ao-57-7-1671 (Publisher URL)
Published Date: 2018-02-28
Authors: Zhao, Yunhe
Wang, Changle
Yin, Guolu
Jiang, Biqiang
Zhou, Kaiming ( 0000-0002-6011-1912)
Mou, Chengbo
Liu, Yunqi
Zhang, Lin ( 0000-0002-1691-5577)
Wang, Tingyun

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