太赫兹波是指频率介于0.1～10 THz之间的电磁辐射, 在电磁波谱上位于微波和远红外光之间。 大多数生物战剂爆炸物在此波段有特征吸收。 与在公共安全领域检测**、生物战剂等危险品的传统方法相比, 太赫兹辐射能量低, 不会产生电离辐射, 对物质可以做到高灵敏、 无损伤和远距离检测。 介绍了国内外太赫兹时域光谱技术在在生物战剂爆炸物检测方面的研究最新进展, 并设计了一种激光雷达光谱探测与实时测量装置, 以傅里叶光学与光信号处理为基础, 使用楔形标准具作为分光镜, 实现背景噪声去除、 激光探测和光谱测量。 测试结果表明, 可探测激光雷达脉冲宽度为10 ns, 并初步探讨了影响实验结果的几种因素, 提出将激光雷达光谱探测技术与太赫兹时域光谱技术相结合, 并采用现代模式识别、信号处理技术是生物化学战剂爆炸物实时光谱检测技术的发展趋势。Spectrum Detection and Terahertz Time Domain Spectroscopy

Terahertz waves (THz,T-ray) lie between far-infrared and microwave inelectromagnetic spectrum with frequency from 0.1 to 10 THz. Many chemical agentexplosives show characteristic spectral features in the terahertz. Compared withconventional methods of detecting a variety of threats, such as weapons andchemical agent, THz radiation is low frequency and non-ionizing, and does notgive rise to safety concerns. The present paper summarizes the latest progress inthe application of terahertz time domain spectroscopy (THz-TDS) to chemical agentexplosives. A kind of device on laser radar detecting and real time spectrummeasuring was designed which measures the laser spectrum on the bases of Fourieroptics and optical signal processing. Wedge interferometer was used as the beamsplitter to wipe off the background light and detect the laser and measure thespectrum. The result indicates that 10 ns laser radar pulse can be detected andmany factors affecting experiments are also introduced. The combination of laserradar spectrum detecting, THz-TDS, modern pattern recognition and signalprocessing technology is the developing trend of remote detection for chemicalagent explosives.