本文提出一种用于高温测量的光子晶体光纤 F-P干涉传感器，通过熔接机放电使无截止单模光子晶体光纤 (ESM-PCF)一个端面完全塌陷，然后再将其与单模光纤 (SMF-28e)熔接起来，最后按照设计长度切断 ESM-PCF。由于在熔接点处 ESM-PCF完全塌陷使其模场直径扩大，减小了与 SMF-28e的模场失配损耗，并提高了熔接面的反射光强。这种方式制作简单，相对于以往的光子晶体光纤 F-P干涉传感器具有更高的干涉光强度。实验结果表明，该传感器测量温度可达 1 100 ℃，温度灵敏度为 29.4 nm/℃，可以预见这种结构稳定、线性度好的全光纤传感器在机械、航空、冶金领域等具有一定的潜在应用价值。

A new method of producing a fiber-optic Fabry-Perot Interferometer (FPI) for high-temperature sensing is presented. The sensor is fabricated by fusion splicing a short section of Endlessly SIngle-mode Photonic Crystal Fiber (ESM-PCF) to the cleaved end of a Single-mode Fiber (SMF) with an intentional complete collapse at the splice joint. Compared with the existing PCF-based FPI sensors, the FPI sensor fabricated by using the simple method have a stable sinusoidal interference fringe with higher interference light intensity. The high-temperature response of the FPI sensor was experimentally studied and the results show that the sensor allows liner and stable measurement of temperatures up to 1 100 ℃ with sensitivity of ~29.4 nm/℃, which makes it very attractive for aeronautics and metallurgy areas.