학술논문
太赫兹波对烟幕的透射能力研究 / Research on transmission capacity of THz for smoke
Document Type
Academic Journal
Author
Source
红外与激光工程 / Infrared and Laser Engineering. 44(12):3696-3700
Subject
Language
Chinese
ISSN
1007-2276
Abstract
基于Mie散射理论计算获得烟幕对337μm太赫兹波的衰减特性,并与其对传统的1.06μm激光、3~5μm和8~12μm的热红外波段的衰减特性进行了对比.结果表明:石墨烟幕对337μm太赫兹波的质量消光系数比其他波长和波段小1~2个数量级.选取两种不同粒径的石墨烟幕在上述波长和波段上分别进行消光特性实验,获得了两种烟幕在各波长和波段上的质量消光系数.实验结果表明:两种烟幕对337μm太赫兹波的质量消光系数均小于0.045 m2/g,且远小于其他探测波长和波段,说明波长更长的太赫兹波具有更强的穿透烟幕的能力.
The extinction characteristic of graphite smoke at 337μm was calculated on the basis of Mie scattering model. And the extinction characteristics of it at conventional infrared bands(3-5μm, 8-12μm) and representative wavelength of laser (1.06μm) were calculated later. The results indicate that the mass extinction coefficient (MEC) of the smoke at 337μm is smaller by 1-2 orders of magnitude than that of other wavelengths or wavebands. Then, the transmission experiments about two kinds of smoke with different diameters of graphite particles were conducted respectively at those wavelengths and wavebands mentioned above. Finally, the MECs at 337μm, 1.06μm, 3-5μm and 8-12μm were deduced, and corresponding experimental results were contrasted. The MECs of two kinds of smoke at 337μm are all less than 0.045 m2/g, and the values at other wavelengths or wavebands are further higher than it. The final results demonstrate that THz wave of 337μm has stronger penetration capacity for smoke.
The extinction characteristic of graphite smoke at 337μm was calculated on the basis of Mie scattering model. And the extinction characteristics of it at conventional infrared bands(3-5μm, 8-12μm) and representative wavelength of laser (1.06μm) were calculated later. The results indicate that the mass extinction coefficient (MEC) of the smoke at 337μm is smaller by 1-2 orders of magnitude than that of other wavelengths or wavebands. Then, the transmission experiments about two kinds of smoke with different diameters of graphite particles were conducted respectively at those wavelengths and wavebands mentioned above. Finally, the MECs at 337μm, 1.06μm, 3-5μm and 8-12μm were deduced, and corresponding experimental results were contrasted. The MECs of two kinds of smoke at 337μm are all less than 0.045 m2/g, and the values at other wavelengths or wavebands are further higher than it. The final results demonstrate that THz wave of 337μm has stronger penetration capacity for smoke.