We propose and experimentally investigate a spiral-polished single-multi-single-mode (SP-SMS) fiber sensor for the simultaneous measurement of strain and temperature. This special spiral shape on a multimode fiber is fabricated by a high-frequency CO₂ laser, which excites higher order cladding modes in the interference process and leads to high strain sensitivity. Experimental results show that the strain sensitivity for the proposed structure in the transmission spectrum of two marked interference dips is − 17 pm/με and − 1 pm/με in the range of 0–600 με. Moreover, temperature sensitivities of 10 pm/℃ and 13.3 pm/℃ are obtained in the range of 30–150 ℃. Furthermore, the proposed sensor is inexpensive, is easy to fabricate and has a compact structure.

我们提出并实验研究了螺旋抛光单多模（SP-SMS）光纤传感器，用于同时测量应变和温度。多模光纤上的这种特殊螺旋形状是由高频CO ₂激光器制造的，它在干涉过程中激发了更高阶的包层模，并导致了高应变敏感性。实验结果表明，该结构在两个明显的干扰波谷的透射谱中的应变敏感度分别为-17 pm /με和-1 pm /με，范围为0-600με。此外，在30–150℃的温度范围内可获得10 pm /℃和13.3 pm /℃的温度敏感性。此外，提出的传感器便宜，易于制造并且具有紧凑的结构。