摘要
太赫兹波的大气传输特性对于太赫兹的空间应用有重要意义。采用随机相位屏法研究了太赫兹波在湍流大气中的水平传输特性。在忽略大气对太赫兹波的吸收与散射、仅考虑大气折射率随机起伏的前提下,通过改变传输距离等参数,对太赫兹波经过湍流大气传输后接收面上的平均光强分布和闪烁指数等进行了研究。作为对比,在同等大气湍流条件下,对可见光波也进行了相应的数值模拟与分析。研究结果表明,同等条件下,太赫兹波受大气湍流的影响明显小于可见光波;大气湍流对太赫兹波的短程应用影响较小。
The propagation characteristics of terahertz （THz） wave in the turbulent atmosphere are very important to the space applications of THz wave. The horizontal propagation characteristics of THz wave in atmospheric turbulence have been studied by the random phase screen method. Through ignoring the scattering and absorption of THz atmospheric conditions and focusing on the atmospheric refractive index fluctuation, the average intensity distribution and scintillation indexes on the receiver plane were studied under different propagation distances in the atmospheric turbulence. For comparison, the visible light waves were also carried out through numerical simulation and analysis under the same conditions. The results show that under the same conditions, the influence of atmospheric turbulence on THz wave is much smaller than it on the visible light wave. Furthermore, atmospheric turbulence has little impact on the short-range application of THz wave.
出处
《激光与光电子学进展》
CSCD
北大核心
2015年第8期76-81,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11347117)
三峡大学优秀人才科研启动基金(KJ2011B066)
关键词
成像系统
太赫兹
大气湍流
随机相位屏
数值模拟
传输
imaging systems
terahertz
turbulent atmosphere
random phase screen
numerical simulation
propagation
