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Seed injection type surface vertical launching terahertz parameter generator and application thereof

A vertical emission and generator technology, applied in the field of terahertz sources, can solve problems such as time asynchrony and achieve the effect of increasing output energy

Inactive Publication Date: 2014-05-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spot size of the pump source of this oscillator-based terahertz parametric source is limited by the parametric oscillator, and the pulses of the three waves participating in the parametric process are not synchronized in time, thus limiting the generation of high-energy terahertz waves

Method used

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  • Seed injection type surface vertical launching terahertz parameter generator and application thereof
  • Seed injection type surface vertical launching terahertz parameter generator and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] like figure 2 shown.

[0022] A seed-injected surface vertical emission terahertz parameter generator includes a laser pump system, a seed optical system, and a nonlinear crystal. The pump pulse laser generated by the laser pump system and the seed pulse light generated by the seed optical system have a certain The included angle passes through the nonlinear crystal, and the Raman and infrared active vibration modes of the nonlinear crystal generate stimulated exciton scattering, resulting in a nonlinear parametric process: obtaining terahertz waves of 0.6-3.0THz. When the nonlinear crystal size allows, increase the spot size of the pump pulse laser and the seed pulse light, and adjust the pulse delay of the pump pulse laser and the seed pulse light to obtain the maximum terahertz energy output. The terahertz parameter source of the terahertz parameter generator according to the present invention is coupled and output vertically or nearly vertically on the side of the...

Embodiment 2

[0042] The seed-injected surface vertical emission terahertz parameter generator described in Embodiment 1 is different in that the seed optical system is the OPO seed optical system 12 .

Embodiment 3

[0044] As described in Example 1, the working method of a seed-injected surface vertical emission terahertz parameter generator is as follows:

[0045] The pump pulse laser generated by the laser pump system and the seed pulse light generated by the seed optical system enter the nonlinear crystal at a certain angle, and interact with the crystal vibration modes that have both Raman and infrared activity in the nonlinear crystal. , to generate stimulated exciton scattering, enhance the seed pulse light, and generate terahertz radiation waves at the same time, change the optical path of the pump pulse laser to the nonlinear crystal to obtain the time synchronization of the pump pulse laser and the seed pulse light. Obtain the vertical coupling output of the high-energy terahertz at the position where the total reflection of the Stokes laser occurs.

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Abstract

The invention relates to a seed injection type surface vertical launching terahertz parameter generator comprising a laser pumping system, a seed photosystem and a nonlinear crystal, wherein pump pulsed laser generated by the laser pumping system and seed pulsed light generated by the seed photosystem pass through the nonlinear crystal at a certain included angle, and a Raman and infrared active vibration membrane of the nonlinear crystal generates stimulated exciton scattering, so that a nonlinear parameter process is generated, and a terahertz wave with the frequency of 0.6-3.0THz is obtained. The seed injection type surface vertical launching terahertz parameter generator disclosed by the invention is designed into a novel experimental apparatus, the spots of the pump light and the seed light are in any sizes under the permission of the size of the nonlinear crystal, and an optical path of the pump light reaching to the nonlinear crystal can be adjusted, so that pump light pulse and seed light pulse are synchronous in time, and furthermore, the terahertz output energy is increased.

Description

technical field [0001] The invention relates to a seed injection surface vertical emission terahertz parameter generator and its application, belonging to the technical field of terahertz sources. Background technique [0002] Stimulated exciton scattering is an important technique for generating terahertz radiation. Visible, near-infrared, and terahertz bands of continuously tunable lasers can be obtained through exciton scattering of certain crystals. Compared with terahertz sources of other technologies, such as optical rectification, quantum cascade lasers, and electrical terahertz sources, this terahertz parametric source based on stimulated exciton scattering has the advantages of package integration, room temperature operation, convenient use, Easy to tune, narrow line width and other advantages. Terahertz parametric sources have always been one of the research hotspots in the field of terahertz generation. There have been a large number of reports on terahertz para...

Claims

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Application Information

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IPC IPC(8): H01S3/30G02F1/35
Inventor 张行愚唐关琦王伟涛丛振华陈晓寒刘兆军王青圃
Owner SHANDONG UNIV
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