基于法布里-珀罗干涉仪的太赫兹波波长测试方法

Ways of wavelength mesasurement of terahertz wave based on Fabry-Perot interferometer

太赫兹波波长的测量在其科研和实际应用中显得日益迫切和重要。阐述了由两个平行的金属网栅构成的Fabry-Perot(F-P)干涉仪测量太赫兹波波长的原理和方法,对金属网栅的参数设计原则进行了论述,从理论上分析了此方法的可行性,并根据此原理推出了计算太赫兹波线宽的公式。设计制作了测量92.9μm赫兹波的金属网栅。为太赫兹波波长测量和谱线线宽估算提供了理论参考。

Wavelength measurement of terahertz wave is more and more urgent and important in science research and practical application. The ways and fundamentals are represented to measure terahertz wavelength using Fabry-Poret （F-P） interferometer made of two parallel metal meshes, the principle of metal mesh parameters design is discussed, the feasibility of this ways is analysed theoretically and the formula of calculating terahertz wave line width is derived. The metal mesh is designed and made for measuring the terahertz wave whose wavelength is 92. 9μm, which gives the theoretical references to wavelength measurement and line width estimation of terahertz wave.