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Circulating Doppler frequency shift nonlinear difference-frequency type broadband tuning terahertz wave generator

A Doppler frequency shifting and wave generator technology, applied in the field of broadband tuned terahertz wave light source, can solve the problems of low tuning efficiency, low conversion efficiency, and narrow tuning width, and achieve high tuning efficiency, simple optical path, and wide tuning width big effect

Inactive Publication Date: 2012-08-15
SHENZHEN UNIV
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  • Application Information

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Problems solved by technology

[0005] In short, the above methods have narrow tuning width, bulky volume, low tuning efficiency, or low conversion efficiency

Method used

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  • Circulating Doppler frequency shift nonlinear difference-frequency type broadband tuning terahertz wave generator
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  • Circulating Doppler frequency shift nonlinear difference-frequency type broadband tuning terahertz wave generator

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0035] The invention provides a cyclic Doppler frequency shift nonlinear difference frequency broadband tuned terahertz wave generator, such as figure 1 As shown, it includes a laser 1, a first circulator 2, an optical beam splitter 3, a cyclic frequency shifting link 4 based on Doppler frequency modulator frequency shifting, a first beam combiner 5, an optical isolator 6, a nonlinear Element 7 and terahertz filter 8. The light output by the laser 1 passes through the first circulator 2 and is divided into the first path and the second path by the optical beam splitter 3. The first path is the reference light, and the second path is input to the cyclic frequency shifting link 4 to generate a cycle The frequency-shifted light, the reference light and the circular frequency-shifted light are combined by the first beam combiner 5, and then frequen...

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Abstract

The invention provides a circulating Doppler frequency shift nonlinear difference-frequency type broadband tuning terahertz wave generator which comprises a laser, a first circulator, a beam splitter, a Doppler frequency modulator frequency shift based circulating frequency shift link, first beam synthesizer, a photoisolator, a nonlinear element and a terahertz wave filter, wherein light output by the laser is split into a first path of light and a second path of light by the beam splitter after passing through the first circulator, the first path of light is used as reference light and the second path of light is input to the circulating frequency shift link to generate circulating frequency shift light, the first beam synthesizer is used for carrying out difference frequency on the reference light and the circulating frequency shift light by the photoisolator in the nonlinear element after the reference light and the circulating frequency shift light are synthesized and then coherent terahertz waves are generated through filtering radiation of the terahertz wave filter. The circulating Doppler frequency shift nonlinear difference-frequency type broadband tuning terahertz wave generator provided by the invention has the advantages of small volume, less quantity and easiness in integration of optical elements, large tuning range, high tuning efficiency and high terahertz wave generation efficiency.

Description

technical field [0001] The present invention relates to a broadband tuned terahertz wave device generated by a difference frequency method, in particular to a broadband tuned terahertz wave light source based on the principles of frequency shifting, cyclic frequency shifting and difference frequency of a Doppler frequency modulator. Background technique [0002] Terahertz (THz, 1 THz=1012 Hz) waves refer to electromagnetic waves whose working frequency is in the range of 0.1-10 THz. The reason why terahertz wave can arouse the strong research interest of scientists is not because of its mysterious and little-known electromagnetic radiation, but mainly because it has many unique properties. It is these unique properties that endow terahertz science Wide application prospects. The unique properties of terahertz waves are mainly manifested in: perspective, safety, and spectral resolution. Terahertz radiation has good penetrability to many dielectric materials and non-polar li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S1/00
Inventor 欧阳征标祁春超
Owner SHENZHEN UNIV
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