Liquid-level sensor based on flat-shaped plastic optical fiber assisted by a long-period grating

Haiyang Bao; Jie Zheng

doi:10.1117/12.3035945

20 November 2024 Liquid-level sensor based on flat-shaped plastic optical fiber assisted by a long-period grating

Haiyang Bao, Jie Zheng

Proceedings Volume 13243, Advanced Sensor Systems and Applications XIV; 132430V (2024) https://doi.org/10.1117/12.3035945
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

A corrugated surface long-period grating (LPG) was imprinted on a flat-shaped plastic optical fiber (POF) as a liquid-level sensor. The flat shape was processed on commercial POF by a simple heat-pressing method, and the LPG was fabricated by a mechanical die-press-print method. The liquid-level sensing performance of the sensor with different structural parameters was evaluated. It was shown that the thinner flat-shaped POF assisted by an LPG exhibits better sensing performance. The LPG with deeper groove depth achieved higher sensitivity, and theoretical calculations were consistent with these results. The highest sensitivity of -0.2332dB/mm was obtained while the flat-shaped POF with a thickness of 500μm, on which was assisted by the LPG with a period of 300μm and a groove depth of 103μm. The results demonstrated that flattening the POF assisted an LPG could improve the liquid-level sensing performance.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Haiyang Bao and Jie Zheng "Liquid-level sensor based on flat-shaped plastic optical fiber assisted by a long-period grating", Proc. SPIE 13243, Advanced Sensor Systems and Applications XIV, 132430V (20 November 2024); https://doi.org/10.1117/12.3035945

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