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Optical Engineering

High-sensitivity optical sensing of axial strain based on microfiber with microarched transition region
Author(s): Liang Xia; Zengshan Xing; Jianhui Yu; Huihui Lu; Heyuan Guan; Yongchun Zhong; Zhe Chen
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Paper Abstract

We demonstrated strain sensing of a microfiber with a microarched transition region, which was fabricated by flame heated tapering. Due to multimode interference of different propagation modes of microfiber, two main transmission dips were observed at 1215.0 and 1469.8 nm. Enhanced by the microarched transition region, the depth of the dip was up to 19 dB at 1215.0 nm. The position of the dip red-shifted while the axial strain changed from 0 to 1166.2    μ ϵ . The axial strain sensitivity was up to 56.6    pm / μ ϵ , which was one order of magnitude higher than that of the traditional optical strain sensor based on microfiber or fiber Bragg grating. The linear correlation coefficient was 98.21%. This kind of microfiber with a microarched transition region can be widely used in various physical, chemical, and biological sensing and detection fields.

Paper Details

Date Published: 17 November 2017
PDF: 6 pages
Opt. Eng. 56(11) 116113 doi: 10.1117/1.OE.56.11.116113
Published in: Optical Engineering Volume 56, Issue 11
Show Author Affiliations
Liang Xia, Jinan Univ. (China)
Zengshan Xing, Jinan Univ. (China)
Jianhui Yu, Jinan Univ. (China)
Huihui Lu, Jinan Univ. (China)
Heyuan Guan, Jinan Univ. (China)
Yongchun Zhong, Jinan Univ. (China)
Zhe Chen, Jinan Univ. (China)

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