基于微环腔型光滤波器的新型气体传感器研究

A Novel Gas Sensor With Optical Filter Sensor Based on Micro-Ring Resonator

基于微环腔型光学滤波是一项正在发展中的新型气体传感技术,在工业生产、环境保护和医学等领域具有广阔的应用前景。利用微环状波导腔构成气室的吸收光谱型气体传感器具有结构紧凑、波长选择性良好等优点.通过气体吸收光谱及微环腔特性的计算和分析,对基于微环腔型光滤波器的新型气体检测传感系统的设计进行了研究和探索,分析了微环尺寸与其谐振波长、自由光谱范围之间的关系。

Optical fiber gas sensing technology based on micro-ring resonator is a new measuring technique, which has a wide applicable prospect in fields of industrial production, environment monitoring and medical science. There is a micro-ring structure in the gas sensor based on absorption spectroscopy, which has some advantages of the whole compact fabric and perfect wavelength selectivity. According to numerical analysis about the characteristic of spectrum absorption of specific gas and micro-ring resonator, a normal design of optical fiber detection system of gas is presented and discussed, which has micro-ring optical filter. The theory of micro-ring resonator is mainly introduced. And the relations among the size of the micro-ring, resonance wavelength and freedom spectrum range are discussed in detail.