Broadband tuning teraHertz wave generator based on modulator frequency shift and cyclic frequency shift

A wave generator and modulator technology, applied in the field of broadband tuned terahertz wave light source, can solve the problems of narrow tuning width, low conversion efficiency, and low tuning efficiency, and achieve the effect of large tuning range, high tuning efficiency, and small size

Inactive Publication Date: 2011-11-23
SHENZHEN UNIV
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Problems solved by technology

[0005] In short, the above methods have narrow tuning width,...

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  • Broadband tuning teraHertz wave generator based on modulator frequency shift and cyclic frequency shift
  • Broadband tuning teraHertz wave generator based on modulator frequency shift and cyclic frequency shift
  • Broadband tuning teraHertz wave generator based on modulator frequency shift and cyclic frequency shift

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The present invention provides a broadband tuned terahertz wave generator based on modulator frequency shift and cyclic frequency shift, such as figure 1 As shown, it includes a laser 1, a circulator 2, an optical beam splitter 3, a cyclic frequency shifting link 4 based on modulator frequency shifting, a beam combiner 5, an optical isolator 6, and a photoelectric converter 7 with a terahertz radiation antenna . The light output by the laser 1 is divided into the first path and the second path by the optical beam splitter 3 after passing through the circulator 2, the first path is the refer...

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Abstract

The invention provides a broadband tuning teraHertz wave generator based on modulator frequency shift and cyclic frequency shift, comprising a laser, a circulator, a light beam splitter, a cyclic frequency shift link based on the modulator frequency shift, a light beam synthesizer, a photoisolator and a photoelectric transducer with a teraHertz radiating antenna, wherein light output by the laser passes through the circulator and then is divided into a first path and a second path by the light beam splitter; the light in the first path belongs to reference light; the light in the second path is input into the cyclic frequency shift link to generate cyclic frequency shift light; the reference light and the cyclic frequency shift light are superposed in the light beam synthesizer to generate beat frequency light in the range of teraHertz frequency; and the beat frequency light passes through the photoisolator and then is received by the photoelectric transducer with the teraHertz radiating antenna, and the photoelectric transducer with the teraHertz radiating antenna gives off coherent teraHertz waves. The generator provided by the invention has the advantages that the volume is small, and fewer optical elements are used, thus being easy to integrate, the tuning range is wide, the tuning efficiency is high and the generating efficiency of the teraHertz waves is high.

Description

technical field [0001] The invention relates to a broadband tuned terahertz wave generator, in particular to a broadband tuned terahertz wave light source based on the principles of modulator frequency shift, cyclic frequency shift and beat frequency. Background technique [0002] Terahertz (THz, 1THz=10 12 Hz) waves refer to electromagnetic waves whose operating frequency is in the range of 0.1 to 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 liquids, so it can perform perspective imaging on non-transparent objects. In a...

Claims

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Application Information

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IPC IPC(8): H01S1/02
Inventor 欧阳征标祁春超
Owner SHENZHEN UNIV
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