Journal
OPTICS EXPRESS
Volume 28, Issue 14, Pages 20372-20378Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.396019
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Polarization-maintaining few-mode fibers (PM-FMFs) have found applications in sensors with attractive features that traditional single-mode fibers do not possess. We propose a measurement method for multi-parameter sensing based on PM-FMFs. This method is mainly based on the polarized interference effect of PM-FMF. We experimentally demonstrate the principle of the simultaneous sensing of temperature, strain and transverse force. The sensor has been verified by three groups of multi-parameter measurement experiments showing that the changes of multi-parameter derived from the wavelength shift of the polarized interference spectrum are consistent with the multi-parameter changes set in the experiments. The proposed PM-FMF based sensor has a temperature sensitivity of 0.3 nm/degrees C, a strain sensitivity of 0.01 nm/mu epsilon and a transverse force sensitivity of 0.0065 nm/(N/m). (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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