We propose and experimentally demonstrate a temperature sensor based on a suspended‐core microstructure optical fiber (SCMF). The sensor is constructed by fusion splicing a piece of SCMF between two up‐tapers which act as light beam couplers. The Mach‐Zehnder interference (MZI) is formed by the silica core modes and the air cladding modes in the SCMF. The sensitivity of −0.011 rad/°C in the temperature range of 20°C to 90°C is achieved, which is more accurate and stable than conventional wavelength tracking method due to the phase demodulation method can avoid the effects of spectral noise, dip selection, and wavelength sampling rate on the wavelength tracking. In addition, our proposed sensor is inert to external environments such as strain and refractive index, which can well solve the problem of crosstalk during temperature sensing.

中文翻译：

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基于相位解调的折射率和应变不敏感的光纤温度传感器

我们提出并通过实验证明了一种基于悬浮芯微结构光纤（SCMF）的温度传感器。该传感器是通过在两个用作光束耦合器的上锥之间熔接拼接一个SCMF来构造的。Mach-Zehnder干涉（MZI）由SCMF中的硅胶芯模和空气包覆模形成。在20°C至90°C的温度范围内实现了−0.011 rad /°C的灵敏度，由于采用了相位解调方法，可以避免光谱噪声，倾角的影响，因此比传统的波长跟踪方法更加准确和稳定。选择，并在波长跟踪上选择波长采样率。此外，我们提出的传感器对诸如应变和折射率之类的外部环境呈惰性，可以很好地解决温度感测期间的串扰问题。