Terahertz radiation source based on optical parameter effect and optical difference frequency effect

A terahertz radiation source and optical parameter technology, applied in masers, electrical components, circuits, etc., can solve the problems of high device cost, low efficiency, and complex structure, and achieve low cost, simple acquisition method, and system structure compact effect

Inactive Publication Date: 2014-07-23
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0007] The purpose of the present invention is to provide a terahertz radiation source based on the optical parametric effect and the optical diff...

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  • Terahertz radiation source based on optical parameter effect and optical difference frequency effect
  • Terahertz radiation source based on optical parameter effect and optical difference frequency effect
  • Terahertz radiation source based on optical parameter effect and optical difference frequency effect

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Embodiment Construction

[0026] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 Shown is a structural principle diagram of an embodiment of a terahertz radiation source based on the optical parametric effect and the optical difference frequency effect of the present invention. It can be seen from the figure that the terahertz radiation source includes a pump source 1, a telescope beam reduction system 2, a first mirror 3, a first beam scanner 4, a resonant cavity composed of two optical lenses 9 and 10, and a mirror group , the second beam scanner 5; the cavity is provided with MgO:LiNbO 3 Crystal 15, MgO:LiNbO 3 The side of the crystal is provided with a silicon prism 14;

[0028] The pump light emitted from the pump source 1 is narrowed by the telescope beam narrowing system 2, and then enters the resonant cavity to excite MgO:LiNbO after passing through the first mirror 3 and the first beam s...

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Abstract

The invention discloses a Terahertz radiation source based on an optical parameter effect and an optical difference frequency effect. The Terahertz radiation source comprises a pumping source, a telescope beam shrinking system, a first reflecting mirror, a first optical beam scanner, a resonant cavity consisting of two optical glasses, a reflecting mirror group and a second optical beam scanner. A MgO:LiNbO3 crystal is arranged in the resonant cavity, and a silicon prism is arranged on the side face of the MgO:LiNbO3 crystal. The Terahertz radiation source is simple in structure, and the parameter process and the difference frequency process can be achieved at the same time in the low-cost MgO:LiNbO3 crystal. The acquiring mode of two difference frequency beams in the difference frequency process is simple, and the entire system is compact in structure, good in stability and low in cost. The incident angle of pumping light is changed by changing the direction of the optical beam scanners, so that the included angle of the pumping light and the axis of a Stokes optical resonant cavity is changed, and thus frequency tuning output of THz waves can be achieved. The tuning mode is simple, and operation is flexible. The pumping light is recycled, due to the fact that the optical parameter process and the optical difference frequency process are achieved at the same time, the output power of the THz waves can be effectively improved, and the optical conversion efficiency of the THz waves is improved.

Description

technical field [0001] The invention relates to a terahertz radiation source based on an optical parameter effect and an optical difference frequency effect. Background technique [0002] Terahertz (Terahertz, referred to as THz, 1THz=10 12 Hz) waves refer to electromagnetic waves with a frequency in the range of 0.1-10 THz, and its wave band is between millimeter waves and infrared waves. The interaction between THz waves and matter contains rich physical, chemical and biological information. The rotation and collective vibration frequencies of various condensed matter and biomacromolecules are in the THz frequency band. Therefore, THz waves are used in high-resolution spectroscopy, medicine Imaging, food safety detection, environmental monitoring, space communication and national defense security and other fields have a wide range of application values. One of the main technical bottlenecks currently limiting the rapid development of THz wave technology is the lack of co...

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Application Information

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IPC IPC(8): H01S1/00
Inventor 李忠洋邴丕彬袁胜周玉朱安福谭联周晓明刘林飞
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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