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Study on spectral features of terahertz wave propagating in the air

机译：太赫兹波在空中传播的光谱特征研究

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Now, Terahertz technology has been widely used in many fields , which is mainly related to imaging detection. While the frequency range of the terahertz-wave is located between microwave and visible light, whether the existing visible light principle is applicable to terahertz-wave should be studied again. Through experiment, we measure the terahertz-wave field amplitude distribution on the receiving plane perpendicular to the direction of propagation in the air and picture out the energy distribution curve; derive an energy decay formula of terahertz wave based on the results; design a terahertz wavelength apparatus using the F-P interferometer theory; test the wavelength between 1 and 3 THz from the SIFIR-50THz laser of American Corehent company; finally analyze the related factors affecting the measurement precision including the beam incident angle, mechanical vibration, temperature fluctuation and the refractive index fluctuation.
机译：现在，太赫兹技术已广泛应用于许多领域，这主要与成像检测有关。虽然太赫兹波的频率范围位于微波和可见光之间，但应再次研究现有的可见光原理是否适用于太赫兹波。通过实验，我们测量了接收平面上垂直于空气传播方向的太赫兹波场振幅分布，并绘制出能量分布曲线。根据结果​​推导太赫兹波的能量衰减公式;利用F-P干涉仪原理设计太赫兹波长仪;用美国Corehent公司的SIFIR-50THz激光器测试1-3 THz之间的波长;最后分析了影响测量精度的相关因素，包括光束入射角，机械振动，温度波动和折射率波动。

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