高灵敏双参量光子晶体光纤传感器的实现方法

Implementation of a Highly Sensitive Dual Parametric Pho⁃tonic Crystal Fiber Optic Sensor

提出了一种D型光子晶体光纤磁流体双芯填充的磁场和温度双参量测量传感器结构。通过缩小第1层空气孔的中心两个孔,增强共振效果,提升灵敏度。引入磁流体填充双芯的磁感通道和乙醇填充的温敏通道,实现高灵敏度传感与双参量传感。结果表明,传感器温度在-30℃~50℃,透射峰温敏度为1.239 nm/℃,线性度达0.9957,损耗峰温度光谱灵敏度为2.514 nm/℃,线性度达0.99717。外界磁场在10 mT~30 mT,透射峰磁场灵敏度为-3.799 nm/mT,线性度达0.99727,且温度的测量误差为1.135%,磁场的测量偏差为6.67%,具有灵敏度高、测量准确、结构紧凑及工艺简单等特点。该研究可进一步优化D型PCF-SPR(photonic crystal fiber based on surface plasmon resonance,基于表面等离子体共振的光子晶体光纤)双参量解调传感的设计。

A D-type photonic crystal fiber magnetic fluid double core filled magnetic field and temperature dual parameter measurement sensor structure was proposed.The resonance effect was enhanced and sensitivity was improved by narrowing the two holes in the center of the air hole in the first layer,the magnetic fluid-filled dual-core magnetic sensing channel and the ethanol-filled temperaturesensitive channel,which were introduced to achieve high-sensitivity sensing and dual-parameter sensing.The results showed that the sensor temperature was-30℃~50℃,the transmission peak tem-perature sensitivity was 1.239 nm/℃,and the linearity reached 0.9957,while the loss peak temperature spectral sensitivity was 2.514 nm/℃,and the linearity reached 0.99717.The external magnetic field was 10 mT~30 mT,the transmission peak magnetic field sensitivity was-3.799 nm/mT,the linearity was up to 0.99727,and the temperature measurement error was 1.135%,the magnetic field measurement deviation was 6.67%,with high sensitivity,accurate measurement,compact structure and other features.This study could further optimize the design of D-type PCF-SPR dual-parameter demodulation sensor.