基于双芯光子晶体光纤耦合微扰传感器  

Dual-core photonic crystal fiber sensor based on coupling perturbation

作　　者：蔡俊 陈奂文 董超 高翔 王语章 CAI Jun;CHEN Huanwen;DONG Chao;GAO Xiang;WANG Yuzhang(School of Science, Southwest University of Science and Technology, Mianyang 621010, China)

机构地区：[1]西南科技大学理学院,绵阳621010

出　　处：《激光技术》2021年第3期326-330,共5页Laser Technology

摘　　要：为了实现高精度温度传感的目的,设计了一种新型双芯光子晶体光纤耦合微扰传感结构,采用有限差分光束传播法对该结构的传感特性进行了分析。利用RSOFT软件的Beampronp模块对该传感器特性进行了仿真研究。结果表明,在满足双芯耦合条件下,折射率灵敏度可达7000nm/RUI;耦合间距灵敏度可达2;在填充液体为乙醇时,该传感结构可实现温度范围为278K~338K的检测,在该范围内的灵敏度可达4nm/K。该传感器检测线性度高、工艺简单,对其它相关传感器的研究有一定帮助和意义。In order to achieve the purpose of high-precision temperature sensing,a novel dual-core photonic crystal fiber coupled perturbation structure was designed.The finite-difference beam propagation method was used to analyze the sensing characteristics of the structure.The Beampronp module of RSOFT software was used to simulate the characteristics of the sensor.The results show that the refractive index sensitivity can reach 7000nm/RUI under the condition of dual core coupling(RUI is the refractive index unit),the coupling spacing sensitivity can reach 2.When the liquid is filled with ethanol,the sensing structure can realize the detection in the temperature range of 278K~338K,and the sensitivity in this range can be up to 4nm/K.The sensor has the characteristics of high linearity and simple process,and the structure is helpful and meaningful to the research of other related sensors.

关 键 词：光纤光学 传感器 有限差分光束传播法 双芯光子晶体光纤 耦合微扰 体积膨胀 

分 类 号：TN253[电子电信—物理电子学] TP212.44[自动化与计算机技术—检测技术与自动化装置]