Study of a liquid level sensor based on a tilted long period grating imprinted on a plastic optical fiber

Haiyang Bao; Bingcheng Wu; Yuan Liu; Yanfei Zhou; Jie Zheng

doi:10.1117/12.2600857

9 October 2021 Study of a liquid level sensor based on a tilted long period grating imprinted on a plastic optical fiber

Haiyang Bao, Bingcheng Wu, Yuan Liu, Yanfei Zhou, Jie Zheng

Author Affiliations +

Proceedings Volume 11901, Advanced Sensor Systems and Applications XI; 119010U (2021) https://doi.org/10.1117/12.2600857
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

A tilted long period grating (LPG) fabricated on a commercial plastic optical fiber (POF) by a simple mechanical die-press-print method was proposed for liquid-level sensing. The liquid level sensing performances of the sensor with different structural parameters were studied theoretically and experimentally. The results show that when the LPG fabricated on a POF with a diameter of 0.25mm and a tilted angle of 30° and the groove depth of 75μm, the highest sensitivity of -0.4631dB/mm was obtained in the level range of 20mm. Additionally, the influences of temperature on the liquid-level sensing performances of sensors were also studied. It shows that the sensitivity of the sensor was decreased with the increase of temperature.

Conference Presentation

Citation Download Citation

Haiyang Bao, Bingcheng Wu, Yuan Liu, Yanfei Zhou, and Jie Zheng "Study of a liquid level sensor based on a tilted long period grating imprinted on a plastic optical fiber", Proc. SPIE 11901, Advanced Sensor Systems and Applications XI, 119010U (9 October 2021); https://doi.org/10.1117/12.2600857

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