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Device for detecting terahertz absorption spectra of gas

An absorption spectrum and detection device technology, which is applied in the field of gas terahertz absorption spectrum detection devices, can solve problems such as low resolution, high cost, and complex detection system, and achieve high frequency resolution, low cost, and simple system Effect

Inactive Publication Date: 2016-06-15
NANJING UNIV
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Problems solved by technology

[0005] Purpose of the invention: In view of the deficiencies in the prior art, the purpose of the present invention is to provide a gas terahertz absorption spectrum detection device, which overcomes the shortcomings of traditional terahertz gas detection systems such as complexity, high cost, and low resolution, and is simple and practical

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  • Device for detecting terahertz absorption spectra of gas

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, the detection device for gas terahertz absorption spectrum, the main structure includes a continuously adjustable terahertz generator 1, a chopper 2, a pair of off-axis parabolic mirrors 3, a vacuum gauge 4, a gas chamber 5, and a gas chamber inlet 6. Gas chamber gas outlet 7 and GolayCell detector 8 .

[0016] Continuously adjustable terahertz generator 1, mainly composed of a high-temperature superconducting BSCCO terahertz radiation source and a Stirling refrigerator for providing a low-temperature environment, used to generate continuously adjustable terahertz signals; chopper 2, used for The terahertz signal radiated from the Stirling window is modulated; the off-axis parabolic mirror 3 is used to converge the modulated terahertz beam; the vacuum gauge 4 is used to detect the gas pressure inside the gas chamber; the gas chamber 5...

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Abstract

The invention discloses a device for detecting terahertz absorption spectra of gas. The device comprises a continuously adjustable terahertz generator, a chopper, off-axis parabolic mirrors, a gas cavity and a GolayCell detector. Terahertz wave beams generated by the terahertz generator are modulated by the chopper, modulated signals are gathered and reflected by one off-axis parabolic mirror, and gathered wave beams penetrate the gas cavity and are gathered on the terahertz detector by the other off-axis parabolic mirror. The device has the advantages that the device is high in frequency resolution, low in cost and easy to popularize and is portable, systems are simple, and the complexity of existing systems can be greatly reduced; the cost can be saved, the device is low in terahertz loss, the terahertz absorption spectra of the gas can be easily and conveniently detected by the device, and accordingly the device has a broad application prospect and research value.

Description

technical field [0001] The invention relates to the technical field of terahertz generators and applications, in particular to a detection device for gas terahertz absorption spectrum. Background technique [0002] Terahertz (terahertz, usually referred to as THz) waves usually refer to electromagnetic waves with a frequency between 0.1 THz and 30 THz (M. Tonouchi, Nature Photonics, 1 (2007) 97). Compared with electromagnetic waves in other frequency bands, terahertz waves have the characteristics of low photon energy and high spatiotemporal coherence, making them have broad application prospects in radio astronomy, biology, remote sensing, communication and other fields. [0003] In the early days, due to the lack of effective means of generating and detecting terahertz radiation, electromagnetic waves in this band were not fully studied and applied. In recent years, the research on the terahertz wave band has become more and more in-depth, and a variety of methods for exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504G01N21/3581
CPCG01N21/3504G01N21/3581
Inventor 王华兵孙汉聪李军吴培亨
Owner NANJING UNIV
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