实时多次取样的超快太赫兹传感/成像技术研究

项目名称： 实时多次取样的超快太赫兹传感/成像技术研究

项目编号： No.61275101

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 徐世祥

作者单位： 深圳大学

项目金额： 80万元

中文摘要： 太赫兹时间域光谱(THz-TDS)传感/成像技术因其泵浦-探针特性迄今还未涉足实时连续多次成像/传感领域。本项目首次提出发展实时多次取样的超快太赫兹成像/传感技术。基于约二十年在超快（非线性）光学和太赫兹电光取样技术方面的研究积累和技术优势，本项目以发展高调制度、强消背底噪声能力和宽动态范围的新型太赫兹电光取样技术为起点，创造性地利用多色激光脉冲串作为探针对脉冲间隔相应的太赫兹脉冲串实行平行电光取样，从而实现对超快事件的实时多次超高时间分辨的太赫兹传感/成像。另外，还将首次利用啁啾脉冲激光探针实现只需单个脉冲就能完成对超快事件的实时多次超高时间分辨的太赫兹光谱传感。利用THz-TDS能同时检测光场振幅和相位的特性对超快事件进行实时多次传感/成像，不但可满足超快相位事物动态演变过程的瞬时成像所需的高灵敏度需求,还可精确获得事件的太赫兹动态光谱特性，非常前沿且具有重要的科学研究和工程应用价值。

中文关键词： 太赫兹；成像；超短激光脉冲；；

英文摘要： Up to date, terahertz time-domain spectroscopy (THz-TDS) has been widely applied in a variety of fields,e.g.biomedical imaging, detection- security,quality control of food and so on, except for real-time sequential multi- samplings for imaging/sensing due to its utilizing pumping-probing technology. This project focuses on real-time sequential multi-sampling ultrafast terahertz imaging/sensing, which is of the extension and development of our about 20-year research work both in ultrafast (nonlinear) optics and in pulse terahertz imaging and sensing fields. This work will begin from developing a novel design of electro-optic(EO) sampling with high terahertz optical modulation, large dynamical range and strong ability to conceal background noises, which shall be very helpful for the successive experiments of this project with high signal-noise ratio. Then the project will realize ultrafast sequential multi-samplings for terahertz imaging/sensing in a creative way, called parallel EO sampling by multi-color pulses (PEOS-MCP). In PEOS-MCP, some multi-color pulses probe simultaneously the terahertz pulses by use of the same one electro-optic (EO) sensor. After passing through the EO sensor, the multi-color pulses propagate seperatedly by a spatial dispersion (imaging) system and detected by corresponding receivers. A

英文关键词： terahertz；optical imaging；ultrashort pulse；；