不同水的太赫兹时域光谱

太赫兹(THz)波检测是一种新型有效的相干检测方法,它可以同时获得被检测物质的振幅和相位信息。利用太赫兹时域光谱技术(THz-TDS)对几种常见水进行了测谱分析;采取迭代的方法,消除了吸收近似带来的误差,完善了透射式太赫兹时域光谱技术中传统的数据处理方法;通过比较不同的滤波器,确定了Symlets9小波滤波为最优的滤波方式;拟合得到了折射率和吸收系数随频率指数变化的规律,其相关系数的平方达到0.9以上。结果表明,不同水的折射率和吸收系数变化曲线的参数值的差异和拟合相关性的不同,可以作为区分水质好坏的依据。

砷化镓光导开关的比较研究

砷化镓光导开关具有响应速度快、转换率较高等特点,为它应用于研究高速器件的性能等方面提供了可能。通过阐述该领域理论和实验的主要研究结果,分析比较国内外的研究现状,为以后的研究工作打下基础。

Analysis on the characteristics of animal tissues based on the Terahertz time domain spectroscopy system

THz spectral properties of several of fresh animal tissues are investigated based on the time domain system. Terahertz pulse transmission spectra of different animal tissues slices with different thickness are obtained, and the refractive index, the absorption coefficient, and the extinction coefficient of these tissues are analyzed and discussed. According to the double Debye model, tissue parameters are simulated and calculated. The theoretical and experimental results are matched. These studies are helpful to make further research of the THz spectral performances of human tissues and cancers.