Thin-Core Fiber Taper-Based Multi-Mode Interferometer for Refractive Index Sensing

Yujie Kong; Xuewen Shu; Haoran Cao; Jiancheng Deng

doi:10.1109/JSEN.2018.2868302

Thin-Core Fiber Taper-Based Multi-Mode Interferometer for Refractive Index Sensing

Yujie Kong
, Xuewen Shu^*
, Haoran Cao
, Jiancheng Deng

^*Corresponding author for this work

Huazhong University of Science and Technology

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We demonstrate a thin-core fiber (TCF)-based hybrid modal interferometer for high-sensitivity refractive index (RI) sensing. It mainly consists of a tapered TCF with an air bubble fabricated by the arc discharge technique using a fusion splicer machine. Due to mode mismatch and the tapering of the TCF, high-order cladding modes are excited, which can be used for high-sensitivity index sensing. The selected two interference dips of the sensor can obtain the index sensitivities of 370.37 and-72.22 dB/RIU in the RI range from 1.333 to 1.3799. Using the differential intensity demodulation method, a total index sensitivity as high as 442.59 dB/RIU can be achieved. Featured with high sensitivity, linear response, small size, ease of fabrication, and low cost, the proposed sensor may have various applications in biochemical sensing field.

Original language	English
Article number	8453892
Pages (from-to)	8747-8754
Number of pages	8
Journal	IEEE Sensors Journal
Volume	18
Issue number	21
Early online date	3 Sept 2018
DOIs	https://doi.org/10.1109/JSEN.2018.2868302
Publication status	Published - 1 Nov 2018

Funding

Manuscript received June 5, 2018; revised July 29, 2018 and August 19, 2018; accepted August 29, 2018. Date of publication September 3, 2018; date of current version October 10, 2018. This work was supported in part by the National Natural Science Foundation of China under Grant 61775074 and in part by the National 1000 Young Talents Program, China. The associate editor coordinating the review of this paper and approving it for publication was Dr. Minghong Yang. (Corresponding author: Xuewen Shu.) The authors are with the Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China (e-mail: [email protected]). Digital Object Identifier 10.1109/JSEN.2018.2868302

Keywords

optical fiber sensors
Refractive index

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10.1109/JSEN.2018.2868302

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title = "Thin-Core Fiber Taper-Based Multi-Mode Interferometer for Refractive Index Sensing",

abstract = "We demonstrate a thin-core fiber (TCF)-based hybrid modal interferometer for high-sensitivity refractive index (RI) sensing. It mainly consists of a tapered TCF with an air bubble fabricated by the arc discharge technique using a fusion splicer machine. Due to mode mismatch and the tapering of the TCF, high-order cladding modes are excited, which can be used for high-sensitivity index sensing. The selected two interference dips of the sensor can obtain the index sensitivities of 370.37 and-72.22 dB/RIU in the RI range from 1.333 to 1.3799. Using the differential intensity demodulation method, a total index sensitivity as high as 442.59 dB/RIU can be achieved. Featured with high sensitivity, linear response, small size, ease of fabrication, and low cost, the proposed sensor may have various applications in biochemical sensing field.",

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AU - Cao, Haoran

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PY - 2018/11/1

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N2 - We demonstrate a thin-core fiber (TCF)-based hybrid modal interferometer for high-sensitivity refractive index (RI) sensing. It mainly consists of a tapered TCF with an air bubble fabricated by the arc discharge technique using a fusion splicer machine. Due to mode mismatch and the tapering of the TCF, high-order cladding modes are excited, which can be used for high-sensitivity index sensing. The selected two interference dips of the sensor can obtain the index sensitivities of 370.37 and-72.22 dB/RIU in the RI range from 1.333 to 1.3799. Using the differential intensity demodulation method, a total index sensitivity as high as 442.59 dB/RIU can be achieved. Featured with high sensitivity, linear response, small size, ease of fabrication, and low cost, the proposed sensor may have various applications in biochemical sensing field.

AB - We demonstrate a thin-core fiber (TCF)-based hybrid modal interferometer for high-sensitivity refractive index (RI) sensing. It mainly consists of a tapered TCF with an air bubble fabricated by the arc discharge technique using a fusion splicer machine. Due to mode mismatch and the tapering of the TCF, high-order cladding modes are excited, which can be used for high-sensitivity index sensing. The selected two interference dips of the sensor can obtain the index sensitivities of 370.37 and-72.22 dB/RIU in the RI range from 1.333 to 1.3799. Using the differential intensity demodulation method, a total index sensitivity as high as 442.59 dB/RIU can be achieved. Featured with high sensitivity, linear response, small size, ease of fabrication, and low cost, the proposed sensor may have various applications in biochemical sensing field.

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Thin-Core Fiber Taper-Based Multi-Mode Interferometer for Refractive Index Sensing

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