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Broad tuning terahertz wave generator based on Doppler frequency modulator cyclic frequency shift

A Doppler frequency and wave generator technology, which is applied in the field of broadband tuning terahertz wave generators, can solve the problems of narrow tuning width, low conversion efficiency, low tuning efficiency, etc., and achieves large tuning range, high tuning efficiency and volume. small effect

Inactive Publication Date: 2011-11-16
SHENZHEN UNIV
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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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  • Broad tuning terahertz wave generator based on Doppler frequency modulator cyclic frequency shift
  • Broad tuning terahertz wave generator based on Doppler frequency modulator cyclic frequency shift
  • Broad tuning terahertz wave generator based on Doppler frequency modulator 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 wide-tunable terahertz wave generator based on cyclic frequency shifting of a Doppler frequency modulator, such as figure 1 As shown, it includes a laser 1, a circulator 2, a beam splitter 3, a cyclic frequency shifting link 4 based on a Doppler frequency modulator frequency shifting, a beam combiner 5, an optical isolator 6 and an optoelectronic converter7. The light output by the laser 1 passes through the circulator 2 and is divided into the first path and the second path by the beam splitter 3. The first path is the reference light, and the second path i...

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Abstract

The invention provides a broad tuning terahertz wave generator based on Doppler frequency modulator cyclic frequency shift. The broad tuning terahertz wave generator comprises a laser, a circulator, a beam splitter, a cyclic frequency shift link based on the Doppler frequency modulator frequency shift, a beam combiner, an optical isolator and a photoelectric converter with a terahertz radiating antenna. Light emitted by the laser is split into a first path and a second path by the beam splitter after passing through the circulator, wherein the first path is reference light, and the second light 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 by the beam combiner to generate beatfrequency light within a terahertz frequency range. The beat frequency light is received by the photoelectric converter with the terahertz radiating antenna after passing through the optical isolator, and coherent terahertz waves are radiated. The generator provided by the invention has a small volume, a wide tuning range, high tuning efficiency and high terahertz generation efficiency, and is easy to integrate due to fewer optical elements.

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 frequency shifting, cyclic frequency shifting and beat frequency of a Doppler frequency modulator. 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 ...

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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