| 基于光子混频原理的连续太赫兹波系统及信号采集分析 |
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| 引用本文： | 徐英,刘建军.基于光子混频原理的连续太赫兹波系统及信号采集分析[J].光学仪器,2010,32(4):43-47. |
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| 作者姓名： | 徐英 刘建军 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 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。
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| 关 键 词： | 太赫兹辐射 光子混频 光电导天线 信号采集 |
Continuous terahertz wave system based on photomixing mechanism and signal acquisition analysis |
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| XU Ying,LIU Jianjun.Continuous terahertz wave system based on photomixing mechanism and signal acquisition analysis[J].Optical Instruments,2010,32(4):43-47. |
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| Authors: | XU Ying LIU Jianjun |
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| Affiliation: | 1Center for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China;2 Center for THz Research, China Jiliang University, Hangzhou 310018, China) |
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| Abstract: | 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. |
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| Keywords: | terahertz radiation photomixing photoconductive antenna signal acquisition |
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