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Abstract
We demonstrate a simple temperature sensor based on an optical microfiber coil resonator which is wrapped on a PMMA rod and embedded in Teflon. The microfiber is thick, strong and easy to be handled, which is 4~5 μm in diameter and more than 1 cm in waist region length. The PMMA rod has a diameter of ~2 mm. The temperature sensitivity is ~80 pm/°C thanks to the large thermal expansion coefficient of PMMA.
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