Abstract
We demonstrate a polarimetric fiber laser system for relative humidity (RH) sensing based on the beat frequency demodulation. The RH sensor probe was fabricated by the graphene oxide-coated D-shaped fiber. The experimental results show that a sensitivity of 34.7 kHz/RH% can be obtained in a RH range of 30%-98%. With such high performance, it can be used in widespread potential fields, such as biology, chemical processing and food processing.
© 2021 The Author(s)
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