Abstract A high-sensitivity sensor based on a tapered dispersion compensation fiber (DCF) structure that consists of a 6 mm DCF spliced between single-mode fibers (SMFs) is proposed for measuring curvature and temperature. A Mach–Zehnder interferometer (MZI) was introduced by fabricating a taper at the first splicing joint. In the experiment, the intensity of the interference dips had a very high linear response to curvature changes with low temperature cross-sensitivity (0.0012 dB/ ∘ C). The results demonstrated a maximum curvature sensitivity of up to 15.19 dB/m−1 within a linear range of 0.98-1.753 m − 1 , and the temperature sensitivity was 79.8 pm/ ∘ C with a range of 25–60 °C. Therefore, the cross-sensitivity was solved by monitoring two independent parameters, in which the wavelength shifts for temperature sensing and the intensity variations for curvature sensing. With its compact structure and high sensitivity, the proposed sensor has potential application value in some fields, such as building structural health monitoring and alerting.

中文翻译：

---

基于锥形色散补偿光纤的高灵敏度曲率和温度传感器

摘要 提出了一种基于锥形色散补偿光纤 (DCF) 结构的高灵敏度传感器，该结构由拼接在单模光纤 (SMF) 之间的 6 mm DCF 组成，用于测量曲率和温度。马赫-曾德干涉仪 (MZI) 通过在第一个拼接接头处制造锥度来引入。在实验中，干扰下降的强度对曲率变化具有非常高的线性响应，具有低温交叉敏感性（0.0012 dB / ∘ C）。结果表明，在 0.98-1.753 m - 1 的线性范围内，最大曲率灵敏度高达 15.19 dB/m-1，温度灵敏度为 79.8 pm/∘ C，范围为 25-60 °C。因此，通过监测两个独立的参数来解决交叉敏感性，其中温度传感的波长偏移和曲率传感的强度变化。该传感器结构紧凑、灵敏度高，在建筑结构健康监测和预警等领域具有潜在的应用价值。