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Hybrid structured fiber-optic Fabry-Perot interferometer for simultaneous measurement of strain and temperature

机译:混合结构光纤Fabry-Perot干涉仪,可同时测量应变和温度

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摘要

We fabricate and experimentally demonstrate a hybrid structured Fabry-Perot interferometer (FPI) embedded in the middle of a fiber line for simultaneous measurement of axial strain and temperature. The FPI is composed of a silicacavity cascaded to a spheroidal air-cavity, both of which are formed in a hollow annular core fiber (HACF). The fabrication process of the FPI includes only a fusion splice between a single-mode fiber and a HACF and several electrical arc discharges at the HACF near the splice point. Experimental results show that the strain and temperature sensitivities of the air-cavity can be 5.2 pm/με and 1.3 pm/℃, respectively, and those of the silica-cavity can be 1.1 pm/με and 13 pm/℃, respectively. The different sensitivities of silica-cavity and air-cavity to strain and temperature enable us to implement simultaneous sensing in strain and temperature.
机译:我们制造并通过实验证明了一种混合结构的Fabry-Perot干涉仪(FPI),该干涉仪嵌入纤维线的中间,用于同时测量轴向应变和温度。 FPI由级联为球形气腔的二氧化硅腔组成,两者均在空心环形芯纤维(HACF)中形成。 FPI的制造过程仅包括单模光纤和HACF之间的熔接,以及HACF在熔接点附近的几个电弧放电。实验结果表明,空洞的应变和温度敏感度分别为5.2 pm /με和1.3 pm /℃,而二氧化硅空洞的应变和温度敏感度分别为1.1 pm /με和13 pm /℃。二氧化硅腔和空气腔对应变和温度的不同敏感性使我们能够同时进行应变和温度感测。

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