CAJ | 학술논문

太赫兹波是指频率介于0.1～10THz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武器、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.
태혁자파시지빈솔개우0.1～10THz지간적전자복사,재전자파보상위우미파화원홍외광지간.대다수생물전제폭작물재차파단유특정흡수.여재공공안전영역검측무기、생물전제등위험품적전통방법상비,태혁자복사능량저,불회산생전리복사,대물질가이주도고령민、무손상화원거리검측.개소료국내외태혁자시역광보기술재재생물전제폭작물검측방면적연구최신진전,병설계료일충격광뢰체광보탐측여실시측량장치,이부리협광학여광신호처리위기출,사용설형표준구작위분광경,실현배경조성거제、격광탐측화광보측량.측시결과표명,가탐측격광뢰체맥충관도위10 ns,병초보탐토료영향실험결과적궤충인소,제출장격광뢰체광보탐측기술여태혁자시역광보기술상결합,병채용현대모식식별、신호처리기술시생물화학전제폭작물실시광보검측기술적발전추세.
Terahertz waves (THz,T-ray) lie between far-infrared and microwave in electromagnetic spectrum with frequency from 0.1 to 10 THz.Many chemical agent explosives show characteristic spectral features in the terahertz.Compared with conventional methods of detecting a variety of threats,such as weapons and chemical agent,THz radiation is low frequency and nonionizing,and does not give rise to safety concerns.The present paper summarizes the latest progress in the application of terahertz time domain spectroscopy (THz-TDS) to chemical agent explosives,A kind of device on laser radar detecting and real time spectrum measuring was designed which measures the laser spectrum on the bases of Fourier optics and optical signal processing.Wedge interferometer was used as the beam splitter to wipe off the background light and detect the laser and measure the spectrum.The result indicates that 10 ns laser radar pulse can be detected and many factors affecting experiments are also introduced.The combination of laser radar spectrum detecting,THz-TDS,modern pattern recognition and signal processing technology is the developing trend of remote detection for chemical agent explosives.