水蒸气中太赫兹波0.6m行程下的传输特性  

Transmission Characteristics of Terahertz Wave in Water Vapor Transmitted 0.6m

作　　者：李进 刘泉澄 熊亮 Li Jin;Liu Quancheng;Xiong Liang(Engineering and Technology,Southwest University of Science and Technology,Mianyang,Sichuan 621010,China;College of Information Engineering,Southwest University of Science and Technology Mianyang,Sichuan 621010,China;Laboratory for Extreme Conditions Matter Properties,Southwest University of Science and Technology,Mianyang,Sichuan 621010,China)

机构地区：[1]西南科技大学工程技术中心,四川绵阳621010 [2]西南科技大学信息工程学院,四川绵阳621010 [3]西南科技大学极端条件物质特性实验室,四川绵阳621010

出　　处：《激光与光电子学进展》2018年第9期64-69,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11176032);极端条件物质特性联合实验室基金(12zxjk05;13zxjk02)

摘　　要：频率在0.1~10THz的太赫兹波具有传输容量大、方向性好、传输效率高等优点。研究其在通信领域的应用,对满足用户对传输速率越来越高的要求具有重要意义。实验通过太赫兹时域光谱(THz-TDS)系统测得0.1~2.4THz太赫兹波在不同湿度的空气中传输0.6m的传输数据,同时采用Dorney等提出的提取光学常数的经典模型得到延迟时间、功率谱、振幅谱和吸收系数等数据。分析结果表明:大气中的水蒸气对太赫兹波具有明显的吸收衰减作用,而且湿度越大衰减作用越强,在吸收峰值处影响更加明显;同时存在弱衰减作用的透明窗口,可应用于太赫兹通信。Terahertz wave at frequency range from 0.1 THz to 10 THz has advantages such as large transmission capacity, good direction, high transmission efficiency and so on. Studying the application to the communication field plays a very important role in satisfying the demand of higher transmission rate for users. The terahertz time-domain spectroscopy （THz-TDS） system is used to measure the terahertz wave transmission data from 0.1 THz to 2.4 THz in atmosphere with different humidities for a 0.6 meters transmission distance. And based on the classical model of extracting optical constants proposed by Dorney et. al., the data such as delay time, power spectrum, amplitude spectrum and absorption coefficient are obtained. The results show that the water vapor in the atmosphere has obvious absorption and attenuation effects on terahertz, and the attenuation rises with the increase of humidity, especially in absorption peak. At the same time, there is transparent window of weak attenuation which can be applied to terahertz communication.

关 键 词：大气光学 太赫兹波 水蒸气 吸收衰减 吸收峰 透明窗口 

分 类 号：TN929.1[电子电信—通信与信息系统]