基于游标效应的双芯光子晶体光纤温度传感器

Dual-core photonic crystal fiber temperature sensor based on vernier effect

设计了一种基于双芯光纤耦合效应和游标效应的高灵敏度温度传感器,传感器是由2个相差一定长度的双芯光子晶体光纤和单模光纤级联构成。双芯光子晶体光纤通过级联实现游标效应,同时对纤芯中间的气孔填充乙醇实现温度传感。仿真结果表明,该温度传感器在35℃~45℃范围内的平均温度灵敏度可达−20.37 nm/℃。与单纯依靠双芯光子晶体光纤能量耦合效应的传感器相比,该传感器的温度检测灵敏度提高了10倍。

A high-sensitivity temperature sensor based on dual-core fiber coupling effect and vernier effect was proposed.The sensor was composed of two fibers which with a certain length difference,they were dual-core photonic crystal fiber and single mode fiber.The vernier effect was achieved by dual-core photonic crystal fiber through the cascade,and in the meantime the temperature sensing was achieved by filling the pores with ethanol in the middle of the fiber core.The simulation results show that the average temperature sensitivity of-20.37 nm/℃of the temperature sensor can be achieved in the temperature range of 35℃~45℃.Compared with the sensor which only depends on the energy coupling effect of dual-core photonic crystal fiber,the temperature detection sensitivity of the proposed sensor is 10 times higher.