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http://hdl.handle.net/10397/105930
Title: | Simultaneous measurement of axial strain and temperature based on a twin-core single-hole fiber with the optical Vernier effect | Authors: | Li, Y Liu, Y Yuan, W Yu, C |
Issue Date: | 16-Jan-2023 | Source: | Optics express, 16 Jan. 2023, v. 31, no. 2, p. 1705-1720 | Abstract: | An ultrasensitive optical fiber sensor based on the optical Vernier effect is proposed for the simultaneous measurement of axial strain and temperature. The sensor structure comprises two cascaded Mach-Zehnder interferometers (MZIs) with different free space ranges. The single MZI is built up by fusion splicing a segment of ∼3 mm twin-core single-hole fiber (TCSHF) between two pieces of ∼5 mm none core fibers (NCF). When acting separately, each MZI can respond linearly to the axial strain change with a sensitivity of ∼ 0.6 pm/µε and temperature with a sensitivity of ∼34 pm/°C. When the two MZIs are cascaded in series, the sensitivities are amplified about 30 times because of the optical Vernier effect. Experimental results demonstrate that the cascaded structure exhibits a high axial strain sensitivity of ∼ 17 pm/µε in the range of 0 to 2000 µε and temperature sensitivity of ∼1.16 nm/°C in the range of 30 to 70 °C. Moreover, the cascaded structure can simultaneously measure the axial strain and temperature change in the acceptable error ranges. | Publisher: | Optica | Journal: | Optics express | EISSN: | 1094-4087 | DOI: | 10.1364/OE.478108 | Rights: | © 2023 Optica Publishing Group under the terms of the Open Access Publishing Agreement (https://doi.org/10.1364/OA_License_v2#VOR-OA). Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. The following publication Li, Y., Liu, Y., Yuan, W., & Yu, C. (2023). Simultaneous measurement of axial strain and temperature based on a twin-core single-hole fiber with the optical Vernier effect. Optics Express, 31(2), 1705-1720 is available at https://doi.org/10.1364/OE.478108. |
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