We present an all-fiber sensor for strain and temperature discrimination by inserting three sections of high birefringence fibers into a Sagnac loop. The principle for strain and temperature discrimination is based on monitoring the wavelength shifts of two different resonant dips that show different sensitivities to temperature and strain. The sensitivities for strain and temperature are measured to be $-{0.93}\;{\rm nm}/^\circ {\rm C}$ and 21 pm/µɛ with discriminative errors of $\pm {0.3}^\circ {\rm C}$ and $\pm {12}\;\unicode{x00B5}\varepsilon$. The proposed sensor with high sensitivity, simple configuration, and low cost may be a promising candidate for various strain and temperature-sensing applications.

中文翻译：

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基于三段高双折射光纤的Sagnac干涉仪进行的应变和温度判别

我们通过将三部分高双折射纤维插入Sagnac环中来提供用于应变和温度识别的全纤维传感器。应变和温度区分的原理是基于监视两个对温度和应变具有不同敏感性的不同共振谷的波长偏移。应变和温度的敏感度分别为$-{0.93} \; {\ rm nm} / ^ \ circ {\ rm C} $和21 pm / µɛ，判别误差为$ \ pm {0.3} ^ \ circ {\ rm C} $和$ \ pm {12} \; \ unicode {x00B5} \ varepsilon $。所提出的具有高灵敏度，简单配置和低成本的传感器对于各种应变和温度感测应用可能是有希望的候选者。