Zhao Jian, Xu Jinsheng, Wang Chongxi, Liu Yaping, Yang Zhiqun
Opt Express. 2020 Jul 6;28(14):20372-20378. doi: 10.1364/OE.396019.
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/°C, a strain sensitivity of 0.01 nm/µε and a transverse force sensitivity of 0.0065 nm/(N/m).
保偏少模光纤（PM - FMF）已在具有传统单模光纤所不具备的诱人特性的传感器中得到应用。我们提出了一种基于保偏少模光纤的多参数传感测量方法。该方法主要基于保偏少模光纤的偏振干涉效应。我们通过实验证明了同时传感温度、应变和横向力的原理。该传感器已通过三组多参数测量实验验证，结果表明，由偏振干涉光谱的波长偏移得出的多参数变化与实验中设定的多参数变化一致。所提出的基于保偏少模光纤的传感器的温度灵敏度为0.3 nm/°C，应变灵敏度为0.01 nm/με，横向力灵敏度为0.0065 nm/(N/m)。
