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Terahertz wave generation method and terahertz wave generation device

A technology of generating device and method, applied in the direction of laser components, instruments, light demodulation, etc., to achieve the effect of avoiding optical damage and high repetition rate

Active Publication Date: 2020-04-17
KK TOPCON +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, it is known that in the atmospheric absorption spectrum in the terahertz region, there are many absorption lines (losses) due to low-molecular-weight gas molecules in the air, especially water vapor

Method used

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  • Terahertz wave generation method and terahertz wave generation device

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Embodiment Construction

[0050] An example of an embodiment of the terahertz wave generating method and the terahertz wave generating device of the present invention will be described in detail with reference to the drawings. The method for generating terahertz waves of the present invention generates terahertz waves in a direction satisfying non-collinear phase matching conditions by injecting pump light into a nonlinear optical crystal capable of generating terahertz waves through an optical parametric effect. Hereinafter, a terahertz wave generating device for realizing the terahertz wave generating method will be mainly described. Hereinafter, for convenience of description, the excitation light is referred to as pump light.

[0051] [Structure Example of Optical System]

[0052] figure 1 A configuration example of the optical system of the terahertz wave generating device of the embodiment is shown. The terahertz wave generating device 1 of the embodiment can generate terahertz waves in direct...

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Abstract

Provided is a terahertz wave generation method used to generate a terahertz wave in a direction that satisfies non-collinear phase matching conditions by inputting pump light into a non-linear opticalcrystal capable of generating the terahertz wave based on an optical parametric effect, wherein the pump light input into the non-linear optical crystal has a pulse width of 10 ps or greater and lessthan or equal to 1 ns with a repetition frequency of 1 kHz or greater, so that the peak excitation power density thereof is greater than or equal to a given terahertz wave oscillation threshold and less than or equal to a given laser damage threshold, and the average excitation power density thereof is less than or equal to a given photorefractive effect generation threshold.

Description

technical field [0001] The invention relates to a terahertz wave generating method and a terahertz wave generating device. Background technique [0002] The terahertz wave region (far infrared region) is a frequency region located at the contact point between light waves and (radio) radio waves, and is a region located at the interface between optics and electrons. This terahertz wave region has both linear propagation like light waves and material permeability like radio waves, and is expected to be applied to imaging and spectroscopy. However, unlike the optical band and radio band, the terahertz wave region is an untapped field in terms of technology and application, and the development of suppression devices for light sources and detectors is strongly expected. In particular, the frequency region of 0.3 to 5 THz is called a terahertz gap. [0003] In recent years, a high-intensity terahertz wave light source using optical rectification has been developed and attracted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/39H01S3/00H01S3/10
CPCH01S3/00H01S3/10G02F1/39G02F1/353G02F2203/13G02F1/3534G02F2/002
Inventor 森口祥圣南出泰亚
Owner KK TOPCON
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