计量学报2023，Vol.44Issue(12)：1791-1798,8.DOI:10.3969/j.issn.1000-1158.2023.12.02
太赫兹辐射空间特性测试系统中的衍射与反射效应
Diffraction and Reflection in Terahertz Radiation Spatial Distribution Measurement
摘要
Abstract
To improve the measurement accuracy of terahertz radiation spatial measurement setup,based on the detector scanning sampling setup,the impact factors existing in the terahertz radiation measurement setup are studied by using software simulation and experimental measurement.The concial reflector and terahertz absorption coating are used to reduce the influence of reflection on the measurement results,which can measure the spatial distribution of radiant power density more accurately.On this basis,the law of terahertz diffraction power density distribution with aperture is studied,and the aperture of terahertz transceiver equipment is reasonably optimized,which provides a research reference for the study of high-precision terahertz radiation spatial distribution measurement.Finally,the uncertainty of the beam width is analyzed,and the results show that the reflection in the system after eliminating the influence of reflection has little effect on the test results,the reflection introduction uncertainty is only 1.56%,and the relative standard uncertainty of the measurementsystem isobtainedas7.6%.关键词
太赫兹辐射/空间特性/反射/衍射/辐照度/锥形反射器/吸收涂层Key words
terahertz radiation/spatial distribution/reflection/diffraction/irradiance/concial reflector/absorption coating分类
通用工业技术引用本文复制引用
王元诚,邓玉强..太赫兹辐射空间特性测试系统中的衍射与反射效应[J].计量学报,2023,44(12):1791-1798,8.基金项目
国家自然科学基金(11874333) （11874333）
河北省重点研发计划(22342001D) （22342001D）
