Supercontinuum Micrometer-Displacement Sensor Using Single-Multi-Air-Gap-Single Mode Fiber as Sensing Probe

Ahmad, Harith and Aidit, Siti Nabila and Ooi, Shok Ing and Tiu, Zian Cheak (2018) Supercontinuum Micrometer-Displacement Sensor Using Single-Multi-Air-Gap-Single Mode Fiber as Sensing Probe. IEEE Sensors Journal, 18 (20). pp. 8275-8279. ISSN 1530-437X, DOI

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In this paper, a displacement sensor utilizing a Mach-Zehnder interferometer with a single-multi-air-gap-single mode (SMAS) fiber structure is proposed and demonstrated. A 30-cm-long four-mode step index fiber (FMSIF) is used as the multimode fiber in the SMAS structure, with the left end of the FMSIF fusion spliced to a 50-cm-long single-mode fiber (SMF-28). The right end of the FMSIF is aligned to another 50-cm SMF-28 on the v-groove of Fitel S178A fusion splicer but without splicing, creating an air gap with a tunable length of 0-300μm. The performance of the displacement sensor is investigated over the range of 1.1-1.7μm using a supercontinuum source. Through the experiment wavelength range, the highest sensor sensitivity is achieved at 1.7 μm with a sensitivity of 12.3 pm/ μm and an R2 coefficient of 0.926. The implementation of a displacement sensor utilizing the simple and cost-effective concept of the SMAS will be beneficial for use in various areas, such as biomedicine, manufacturing, and engineering.

Item Type: Article
Funders: Ministry of Higher Education, Malaysia, under Grant GA 010 – 2014 (ULUNG), University of Malaya under Grant RU 001 – 2017
Uncontrolled Keywords: Displacement sensor; Mach-Zehnder interferometer; single mode-multimode-single fiber
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 04 Oct 2019 08:41
Last Modified: 04 Oct 2019 08:41

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