A method for generating terahertz pulses and detecting them in real time

Abstract

The invention relates to a method for generating and detecting terahertz pulses in real time. According to the technical scheme, the method comprises the steps that a metallic vapor vacuum arc method is carried out on lithium niobate single crystals grown through a crystal pulling method to obtain a lithium niobate single crystal sheet with copper injected, and the lithium niobate single crystal sheet is used as a terahertz radiation source (5); laser pulses generated by a titanium sapphire laser (3) enter the terahertz radiation source (5) in an incident mode, and terahertz pulses are generated through an optical rectification method; a terahertz time-domain pulse spectrum is obtained through an electro-optical sampling method, and finally fast Fourier transformation is carried out on the terahertz time-domain pulse spectrum through MatLab software installed in a computer to obtain a terahertz frequency-domain pulse spectrum. The method has the advantages that the device is simple, cost is low, the raw materials of the terahertz radiation source are rich and easy to obtain, and the terahertz pulses are high in generation efficiency.

Description

technical field [0001] The invention belongs to the technical field of terahertz radiation sources, in particular to a method for generating terahertz pulses and detecting them in real time. Background technique [0002] Terahertz (THz) is a frequency band between macroelectronics and microphotonics, with a frequency between 0.1THz and 10THz. The special frequency band of terahertz pulse determines its special properties. It is not only suitable for biomedical imaging and detection imaging, but also a powerful tool for reconnaissance, identification, blinding, countering wireless communication and anti-terrorism of moving targets in space. In the past few years, terahertz applications have penetrated into fields such as physics, sensing, communication, and life sciences. More than 100 research groups in the world have been engaged in research in related fields of terahertz. The development of terahertz pulsed radiation source technology is the key to promote the rapid deve...

AI Technical Summary

Problems solved by technology

[0003] At present, the electric field intensity of the terahertz pulse generated by the traditional terahertz pulse generation technology is low, the energy of the terahertz pulse is also low, and the energy conversion efficiency is not high, and an additional laser is required to detect the generated terahertz pulse at the same time Used to generate probe light, so the experimental setup is complex and costly

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