基于空芯光子晶体光纤的微小型非本征光纤法布里-珀罗干涉应变传感器

A Miniature Extrinsic Fabry-Pérot Interferometer Strain Sensor Based on Hollow-Core Photonic Crystal Fiber

报道了一种用空芯光子晶体光纤制作的法布里-珀罗腔体,利用光纤熔接方法将该法布里-珀罗腔体和两根普通通信单模光纤熔接起来构成的微小型光纤法布里-珀罗干涉应变传感器。这种干涉传感器制作过程仅应用了切割和熔接手段,光纤材料单一,因此受温度变化的影响小。另外,该类型传感器的干涉腔长度对干涉信号强度影响不大,其干涉腔长度可至数厘米。因此,这类传感器将在大容量、准分布式传感系统中具有极大的潜在应用价值。

A miniature extrinsic Fabry-Pérot interferometer （EFPI） sensor based on photonic crystal fiber with very low temperature sensitivity is fused by using a simple welding method, which can effectively reduce the cross sensitivity between strain and temperature. And the transmission loss of the HCPCF is very low that allows the cavity length to be as long as several centimeters with good visibility. That makes the sensors may find its application in quasi-distributed sensing.