This paper presents an all-silica microwire optical sensor designed for both fast response time and high-resolution temperature detection. The sensor consists of a thin optical microwire created at the tip of an optical fiber, configured as a temperature sensitive Fabry-Perot interferometer. For the purposes of achieving rapid response times, the sensing section of the sensor has a diameter of 11 μm. Experimental bench tests were set up to evaluate the sensor’s static and dynamic performance. The results indicate a sensor system resolution of about 5 mK and demonstrate a bandwidth of 38 Hz that corresponds to a response time of 4ms in still air. The sensor’s functionality is shown through a basic periodic gas compression method detecting small temperature fluctuations. In addition, the sensor was demonstrated for operation up to 600 degrees Celsius.
January 2024IEEE Sensors JournalPP(99):1-1
DOI: 10.1109/JSEN.2024.3517640
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