A high-sensitivity temperature sensor based on liquid-infiltrated large lateral offset structure

Yundong Zhang; Ying Guo

doi:10.1117/12.2614622

2 March 2022 A high-sensitivity temperature sensor based on liquid-infiltrated large lateral offset structure

Yundong Zhang, Ying Guo

Proceedings Volume 12016, Optical and Quantum Sensing and Precision Metrology II; 120160U (2022) https://doi.org/10.1117/12.2614622
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We demonstrated the high sensitivity and mechanical strength temperature and strain sensor based on liquid-infiltrated Fabry-Perot interferometer (FPI). The sensor is fabricated by splicing a short section of single-mode fiber (SMF) between two sections of SMF with a large intentional lateral offset forming open-cavity. For its high thermo-optic coefficient (TOC), isopropanol leads to a huge wavelength variation of the reflection spectrum while external temperature changes. The sensor was used to monitor the change of temperature and obtained a sensitivity of up to -655.0pm/°C in the range of 20 to 45 °C. In addition, the sensor presents a high sensitivity to a strain of 20.8pm/με. The sensor is expected to be used in high-sensitivity temperature and strain monitoring environments.

Conference Presentation

Citation Download Citation

Yundong Zhang and Ying Guo "A high-sensitivity temperature sensor based on liquid-infiltrated large lateral offset structure", Proc. SPIE 12016, Optical and Quantum Sensing and Precision Metrology II, 120160U (2 March 2022); https://doi.org/10.1117/12.2614622

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