侧面抛磨型双芯熊猫光纤的折射率传感特性仿真分析

Simulation Analysis of Refractive Index Sensing Characteristics of Side Polishing Double-Core Panda Fiber

研究了双芯熊猫光纤经侧面抛磨后的折射率传感特性,并具体分析了抛磨、纤芯尺寸、纤芯、折射率对比度对传感器特性的影响.通过侧面抛磨方式,可以使得熊猫光纤一侧气孔侧壁与外界待测液体接触,这有助于加快响应速度;同时利用Mach-Zehnder干涉检测方式可以获得较高的流体折射率检测灵敏度.仿真表明,经过优化的双芯熊猫光纤结构可望使系统检测液体折射率的灵敏度达到3.8×10-5 RIU(Refractive Index Unit).

It have been studied that the refractive index sensing characteristics of the double core panda fiber side polished, and analyzed the effects of polishing, core size, core and refractive index on the characteristics of the sensor detail. Through the side polishing method, the panda fiber lateral wall stomata can be connected with outside liquid, this helps to speed up the response. And we can acquire the higher detection sensitivity of the liquid refractive index. The simulation results show that the optimized structure of the double-core panda optical fiber is expected to achieve a sensitivity of 3.8 × 10-5 RIU.