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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 3578–3584

Highly sensitive force sensor based on optical microfiber asymmetrical Fabry-Perot interferometer

Yuan Gong, Cai-Bin Yu, Ting-Ting Wang, Xiu-Ping Liu, Yu Wu, Yun-Jiang Rao, Ming-Lei Zhang, Hui-Juan Wu, Xiao-Xiao Chen, and Gang-Ding Peng  »View Author Affiliations

Optics Express, Vol. 22, Issue 3, pp. 3578-3584 (2014)

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An asymmetrical Fabry-Perot interferometric (AFPI) force sensor is fabricated based on a narrowband reflection of low-reflectivity fiber Bragg grating (LR-FBG) and a broadband Fresnel reflection of the cleaved fiber end. The AFPI sensor includes a section of microfiber made by tapering and it achieves a force sensitivity of 0.221pm/μN with a tapered microfiber of 40mm length and 6.1μm waist diameter. Compared with similar AFPI structure in 125μm-diameter single mode fiber, the force sensitivity of the microfiber AFPI structure is greatly enhanced due to its smaller diameter and can be optimized for different force scales by controlling the diameter. The fabrication process of the AFPI sensor is simple and cost-effective. The AFPI sensor has better multiplexing capacity than conventional extrinsic fiber-optic Fabry-Perot sensors, while it also release the requirement on the wavelength matching of the FBG-pair-based FPI.

© 2014 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.3990) Optical devices : Micro-optical devices
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:

Original Manuscript: December 9, 2013
Revised Manuscript: January 25, 2014
Manuscript Accepted: January 29, 2014
Published: February 6, 2014

Yuan Gong, Cai-Bin Yu, Ting-Ting Wang, Xiu-Ping Liu, Yu Wu, Yun-Jiang Rao, Ming-Lei Zhang, Hui-Juan Wu, Xiao-Xiao Chen, and Gang-Ding Peng, "Highly sensitive force sensor based on optical microfiber asymmetrical Fabry-Perot interferometer," Opt. Express 22, 3578-3584 (2014)

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