Device for testing absorption response of terahertz waves in different gas environments

Abstract

The invention relates to a device for testing the absorption response of terahertz waves in different gas environments. An ultrashort-pulse laser output from a laser light source is divided into two beams through a beam splitting sheet, and a transmitted beam passes through a first reflecting mirror, a delay module, a second reflecting mirror, a third reflecting mirror and an ITO film and then serves as terahertz wave probe light to enter a terahertz wave spectrum detection system. The other part of light beam reflected by the beam splitting sheet enters a terahertz wave transmitting system. Radiated collimating terahertz waves enter a vacuum pipeline filled with gas through a terahertz wave inlet window flake. After the terahertz waves interact with gas molecules and is emergent from a terahertz wave outlet window flake, the terahertz waves enter the terahertz wave transmitting system after passing through a fourth reflecting mirror and the ITO film. A heating belt and a refrigeration device are arranged on the outer wall of the vacuum pipeline, and the real-time temperature inside the vacuum pipeline is controlled. The total length of the vacuum pipeline can be adjusted by inserting a plurality of sections of vacuum pipelines. By the adoption of the device, the absorption response characteristic of the terahertz waves in the gas environments of different temperatures and pressure intensities can be tested.

Description

technical field [0001] The invention relates to the field of terahertz spectroscopy, in particular to a device for testing the absorption response of terahertz waves in different gas environments. Background technique [0002] Terahertz waves refer to electromagnetic waves (1THz=10 12 Hz), which lies between microwaves and infrared radiation on the electromagnetic spectrum. The special electromagnetic spectrum position of terahertz wave makes it have many unique advantages, such as low photon energy, at the millielectron volt level, it will not cause harmful photoionization to biological tissues, and many substances have strong Absorption and dispersion can be used to identify different substances, etc. [0003] There are various substances in the atmosphere, and there is a certain non-cooperation for the transmission of terahertz radiation, that is, there is absorption attenuation. The tropospheric atmosphere has a very obvious continuous and absorption effect on teraher...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the current problem of lack of terahertz wave absorption response data in the atmosphere, and proposes a device for testing the absorption response of terahertz waves in different gas environments, using terahertz generation and detection devices, vacuum pipes (length can be changed ), vacuum pump, heating belt, refrigeration device, pressure gauge, gas injection device, can measure the absorption response characteristics of terahertz in different temperature and different pressure gas environments

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