基于光子混频原理的连续太赫兹波系统及信号采集分析  

Continuous terahertz wave system based on photomixing mechanism and signal acquisition analysis

作　　者：徐英[1] 刘建军[2] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室光及电磁波研究中心,浙江杭州310058 [2]中国计量学院太赫兹技术与应用研究所,浙江杭州310018

出　　处：《光学仪器》2010年第4期43-47,共5页Optical Instruments

基　　金：国家自然科学基金资助项目(60576042;60977066)

摘　　要：由于连续太赫兹波辐射具有非常窄的频宽,在需要精细光谱分辨力的测量中具有重要应用。文中基于光子混频原理,采用两个独立的半导体激光器作为蝶形光电导天线的辐照光源,搭建了一个室温工作且可调谐的连续太赫兹波系统。重点讨论了太赫兹信号采集软件的设计;并对诊断模式、抽样模式以及连续模式下获得的信号进行了简要分析。Continuous-wave terahertz radiation source, which has very narrow bandwidth, is very important in precision spectroscopy application. Based on photomixing mechanism, two separate semiconductor lasers are used as the incident light source for bow-tie photoconductive antennas and a continuous-wave tunable terahertz radiant system working on the room temperature is set up. The software design for terahertz signal acquisition is mainly introduced. The signals attained in the diagnostic mode, sample mode and continuous mode are analyzed.

关 键 词：太赫兹辐射 光子混频 光电导天线 信号采集 

分 类 号：O431[机械工程—光学工程] TN2[理学—光学]