A temperature sensor with a wide measurement range and high sensitivity is proposed and analyzed. It is based on a microstructured fiber (MSF) Sagnac interferometer. The air holes were filled with ethanol by a full filling method. Increase of the birefringence and the sensitivity of the proposed sensor can be achieved by moving the two air holes on the left and right sides of the core. For an MSF with air hole diameters D₁ = 0.8 μm, D₂ = 0.6 μm, and D₃ = 0.4 μm, pitch Λ = 2 μm, and distance R = 8.2 μm, when the length of the MSF is 0.274 cm, the simulation results show that the sensitivity of the proposed sensor can reach 14.7 nm/°C in the temperature range from 15 to 75 °C. This means that the length and sensing range of the MSF have a great influence on the sensitivity of our designed MSF temperature sensor. Because of the advantages of simple structure, high sensitivity, and wide temperature measurement range, the proposed temperature sensor has great application prospects in environmental temperature measurement.

提出并分析了一种宽量程，高灵敏度的温度传感器。它基于微结构纤维（MSF）Sagnac干涉仪。通过完全填充方法在气孔中填充乙醇。可以通过移动纤芯左右两侧的两个气孔来实现双折射和传感器灵敏度的提高。对于气孔直径D ₁ = 0.8μm，D ₂ = 0.6μm和D ₃ = 0.4μm，间距Λ= 2μm，距离R的MSF= 8.2μm，当MSF的长度为0.274 cm时，仿真结果表明，所提出的传感器的灵敏度在15至75°C的温度范围内可以达到14.7 nm /°C。这意味着MSF的长度和感应范围对我们设计的MSF温度传感器的灵敏度有很大影响。由于其结构简单，灵敏度高，温度测量范围宽等优点，因此在环境温度测量中具有广阔的应用前景。