17 November 2017 High-sensitivity optical sensing of axial strain based on microfiber with microarched transition region
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Liang Xia, Liang Xia, Zengshan Xing, Zengshan Xing, Jianhui Yu, Jianhui Yu, Huihui Lu, Huihui Lu, Heyuan Guan, Heyuan Guan, Yongchun Zhong, Yongchun Zhong, Zhe Chen, Zhe Chen, } "High-sensitivity optical sensing of axial strain based on microfiber with microarched transition region," Optical Engineering 56(11), 116113 (17 November 2017). https://doi.org/10.1117/1.OE.56.11.116113 . Submission: Received: 8 September 2017; Accepted: 3 November 2017
Received: 8 September 2017; Accepted: 3 November 2017; Published: 17 November 2017
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