用于光谱吸收式气体传感系统的空芯波导的小型化研究  

Research on Miniaturization of Hollow Waveguide for Spectrum Absorptive Gas Sensing System

作　　者：卫雨青[1] 魏静怡 朱晓松[1] 石艺尉[1] 

机构地区：[1]复旦大学信息科学与工程学院,上海200433

出　　处：《光学学报》2016年第9期259-266,共8页Acta Optica Sinica

基　　金：上海市自然科学基金(15ZR1404100)

摘　　要：基于空芯波导的柔韧性可以将若干米长的波导弯曲至半径若干厘米的圆盒内,配合光源及检测器即可得到光程长、气体容积小、响应速度快的小型化气体传感系统。建立了一种基于几何光学理论的弯曲波导传输模型,通过仿真与实验研究了弯曲空芯波导的传输与传感特性,总结了通过优化波导长度、弯曲半径、系统信噪比、波导孔径及光源发散角等参数降低系统检测极限、提高灵敏度的方法。Because of the flexibility of hollow waveguide, the waveguide with several meters long can be bent inside a round box with a radius of only several centimeters. By using light source and detector, the miniaturized gas sensing system with long optical path, small gas volume and fast response can be obtained. A curved waveguide transmission model based on geometrical optics theory is established. The transmission and sensing characteristics of bent hollow waveguide are investigated by simulation and experiment. The methods to reduce system detection limit and improve sensitivity by optimizing such parameters like the waveguide length, bending radius, system signal to noise ratio, waveguide aperture and light source divergence angle are summarized.

关 键 词：光学器件 光波导 空芯波导 优化设计 气体传感 

分 类 号：TN252[电子电信—物理电子学]