设计了一种基于表面等离子体共振(SPR)的光纤温度传感器。将单模光纤和多模光纤端面研磨成楔形并进行拼接，在单模光纤的研磨面上镀制厚度为50 nm的金膜以形成Kretschmann结构，然后涂覆一层聚二甲基硅氧烷(PDMS)作为温度敏感介质来实现温度传感。实验结果表明：当温度为20~70 ℃时，该传感器的灵敏度的绝对值最大可达到4.15 nm/℃，远大于其他类型的光纤温度传感器的灵敏度；与其他SPR光纤温度传感器相比，该传感器具有更窄的半峰全宽和更优的品质因数；该传感器具有较高的稳定性，其最大的温度标准差为0.14 ℃。该传感器结构简单，制作成本低廉，有望在工业领域内得到广泛应用。

An optical fiber temperature sensor based on surface plasmon resonance (SPR) is designed. The ends of a single-mode fiber and a multi-mode fiber are ground into wedge shapes and spliced. The gold film with a thickness of 50 nm is plated on the polished surface of this single-mode fiber to form the Kretschmann configuration. Then a layer of polydimethylsiloxane (PDMS) is coated as temperature sensitive medium and thus temperature sensing is realized. The experimental results show that the maximum sensitivity of this sensor can reach 4.15 nm/℃ when temperatures are between 20 ℃ and 70 ℃, much higher than those of other types of optical fiber temperature sensors. Compared with other SPR-based optical fiber temperature sensors, this sensor has a much narrower full width at half maximum and a larger figure of merit. In addition, this sensor has a relatively high stability with the maximum temperature standard deviation of 0.14 ℃. This sensor has a simple structure and low cost, and is expected to be widely used in the industrial field.