PHotonIc THz Synthesis for Imaging and detectioN (PHITSIN)

用于成像和检测的光子太赫兹合成 (PHITSIN)

• 批准号: EP/E027520/1
• 负责人: Alwyn Seeds
• 金额: $ 41.27万
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FE027520%2F1
• 关键词: PHotonIc; THz; Synthesis; Imaging; detectioN

The detection of explosives carried about the person is an important current security concern. Explosives absorb high frequency waves in a characteristic manner, depending on the frequency of those waves. The frequencies of interest are in the teraHertz (THz) range, about a thousand times as high as the frequency range used by mobile phones. Signals at these frequencies can pass through clothes with little absorption, so that concealed explosives can be detected.Generating signals at such extremely high frequencies is difficult and usually requires a large and expensive laser having power consumption similar to an electric oven. Such a system is not very practical for checking whether people are carrying explosives.We have developed very efficient converters of light to THz signals which can be used with very small semiconductor lasers, requiring a total power of about 1 W, about the same as a small torch. In this project we propose to use these converters with a new and very sensitive detection scheme to create a system for detecting concealed explosives.In addition this type of technology could be used in a compact scanning system to identify concealed weapons and other items of security interest.

探测随身携带的爆炸物是当前一个重要的安全问题。爆炸物以特有的方式吸收高频波，这取决于这些波的频率。感兴趣的频率在太赫兹（THz）范围内，大约是移动的电话使用的频率范围的一千倍。这些频率的信号可以穿过衣服，几乎没有吸收，因此可以检测到隐藏的爆炸物。产生这种极高频率的信号是困难的，通常需要一个大而昂贵的激光器，其功耗类似于电烤箱。这种系统对于检查人们是否携带爆炸物来说并不实用。我们已经开发出非常有效的光到THz信号的转换器，可以与非常小的半导体激光器一起使用，需要大约1 W的总功率，大约与小型火炬相同。在本项目中，我们建议将这些转换器与一种新的、非常灵敏的探测方案一起使用，以建立一种探测隐藏爆炸物的系统。此外，这种类型的技术可用于紧凑的扫描系统，以识别隐藏的武器和其他具有安全利益的物品。

项目成果

Optoelectronic detection of millimetre-wave signals with travelling-wave uni-travelling carrier photodiodes.

使用行波单行载流光电二极管对毫米波信号进行光电检测。

• DOI: 10.1364/oe.19.002079
• 发表时间: 2011
• 期刊: Optics express
• 影响因子: 3.8
• 作者: Rouvalis E

Traveling-wave Uni-Traveling Carrier photodiodes for continuous wave THz generation.

• DOI: 10.1364/oe.18.011105
• 发表时间: 2010-05
• 期刊: Optics express
• 影响因子: 3.8
• 作者: E. Rouvalis;C. Renaud;D. Moodie;M. Robertson;A. Seeds

A compact tunable coherent terahertz source based on an hybrid integrated optical phase-lock loop

基于混合集成光学锁相环的紧凑型可调谐相干太赫兹源

• DOI: 10.1109/mwp.2010.5664138
• 发表时间: 2010
• 作者: Ponnampalam L

Photonic-Enabled Microwave and Terahertz Communication Systems [Invited Paper].

光子微波和太赫兹通信系统[特邀论文]。

• 发表时间: 2009
• 作者: Chin Pang Liu