Sagnac mirror loop with two polarization maintaining fibers for twist measurement by tracking adjacent dips with tunable measurement range

Xue, Pingsheng, Liu, Qiang, Wu, Qiang and Fu, Yong Qing (2022) Sagnac mirror loop with two polarization maintaining fibers for twist measurement by tracking adjacent dips with tunable measurement range. Optics and Laser Technology. ISSN 0030-3992 (In Press)

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Abstract

The transmission characteristics of Sagnac fiber loop interferometer which consists two sections of polarization-maintaining fiber (PMF) spliced at different offset angles were analyzed. Based on the simulation results, an application for twist measurement where PMFs were spliced at different offset angles was designed. When the lengths of two PMFs are equal, a clear spectrum can be obtained for twist or torsion sensing. A phenomenon that the dips would split or merge with twist angle alteration can be used for sensing. Measurement range and sensitivity can be adjusted by changing the PMFs offset angle. The sensitivity was improved by calculating the distance between two adjacent dips, being 0.73 nm/° or 8.37 nm/(rad/m) when the offset angle was 75°.

Item Type: Article
Additional Information: Funding information: This research was funded by the National Natural Science Foundation of China (Grant No. 51907017), the Key Science and Technology Research Projects of Higher Education Institutions in Hebei Province of China (Grant No. ZD2019304), Hebei Natural Science Foundation (Grant No. F2020501040), the Fundamental Research Funds for the Central Universities of China (Grant No. N2123012).
Uncontrolled Keywords: fiber loop interferometer, polarization maintaining fiber, fiber sensor
Subjects: H600 Electronic and Electrical Engineering
H900 Others in Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 12 Jan 2022 16:19
Last Modified: 12 Jan 2022 16:30
URI: http://nrl.northumbria.ac.uk/id/eprint/48150

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