All-Sapphire Miniature Optical Fiber Tip Sensor for High Temperature Measurement
| Autor: | Shuo Yang, Anbo Wang, Gary Pickrell, Xiaoting Jia, Yizheng Zhu, Ziang Feng, Wing Ng |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Optical fiber business.industry Laser beam welding 02 engineering and technology Thermal diffusivity Temperature measurement Atomic and Molecular Physics and Optics law.invention Interferometry 020210 optoelectronics & photonics Fiber optic sensor law 0202 electrical engineering electronic engineering information engineering Sapphire Optoelectronics Fiber business |
| Zdroj: | Journal of Lightwave Technology. 38:1988-1997 |
| ISSN: | 1558-2213 0733-8724 |
| DOI: | 10.1109/jlt.2019.2953156 |
| Popis: | High temperature sensor with robust performance, minimum footprint, and fast response is desirable for many applications in extreme environments. This article introduces a miniature high temperature sensor based on fiber Fabry-Perot interferometer. The interferometric cavity is directly fabricated on the tip of a 125 μm single-crystal sapphire fiber through femtosecond laser micromachining and CO2 laser welding with the sapphire fiber as a light-guiding element. The sensor has an all-sapphire structure to ensure both physical and chemical stability. The sensor was tested in the lab from room temperature up to 1455 °C and shows an excellent temperature response with 1.32 nm/ °C at room temperature and full-range average resolution of 0.68 °C. The thermal response of the sensor is evaluated via both numerical simulation and experiment. Owing to the small size and fast thermal diffusivity of sapphire, the thermal response time of ∼1.25 ms has been experimentally demonstrated. |
| Databáze: | OpenAIRE |
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