基于van-Vleck Weisskopf线型与辐射传输色散理论,结合JPL数据库,建立了太赫兹脉冲大气传输衰减与色散模型,形成了对宽频太赫兹辐射脉冲在大气中的吸收衰减的数值模拟能力；并对利用太赫兹时域光谱技术(THz-TDS)所获得的透射光谱实测结果进行了对比分析, 研究了不同水汽密度对太赫兹时域脉冲幅值、相位及频谱特性的影响.研究结果表明:短距离大气传输条件下,0.1~0.5 THz频段太赫兹脉冲的最大传输速率达20 Gb/s 以上,相较于单模光纤,更具短距离通信优势.

A code of the terahertz wave’s atmospheric transmission and dispersive attenuation was developed with the radiation transmission theory and Van-Vleck Weisskopf line-shape based on the JPL database. The short term THz wave atmospheric transmission experimental results obtained from the THz-time domain spectroscopy (THz-TDS) technique was analyzed by this code. The absorbing attenuation characteristics and the time domain waveform of the terahertz transmission pulses were compared. The influence of the humidity on the amplitude, phase and spectrum of the transient terahertz pulse was studied. It was concluded that the maximum wireless transmission data rate exceeds 20 Gb/s between 0.1 and 0.5 THz, which is much faster than through the single mode fiber (SMF) and more suitable for short distance communication.