Broadband tuning terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift

An ultrasonic grating 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, small size, and large tuning range.

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, bu

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  • Broadband tuning terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift
  • Broadband tuning terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift
  • Broadband tuning terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift

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[0027] 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.

[0028] The present invention provides a broadband tuned terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift, 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 ultrasonic grating 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 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 ...

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Abstract

The invention provides a broadband tuning terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift. The broadband tuning terahertz wave generator comprises a laser, a circulator, a beam splitter, a cyclic frequency shift link based on the ultrasonic grating frequency shift, a beam combiner, an optoisolator and a photoelectric converter with a terahertz radiating antenna; light output by the laser passes through the circulator and then is split into a first path and a second path by the beam splitter; the first path is reference light and the second path is input to the cyclic frequency shift link to generate cyclic frequency shift light; the reference light and the cyclic frequency shift light are superposed in the beam combiner to generate beat frequency light in the range of the terahertz frequency; and the generated beat frequency light is processed by the optoisolator and then is received by the photoelectric converter with the terahertz radiating antenna, and the photoelectric converter radiates coherent terahertz waves. The generator provided by the invention has small volume, easiness for integration due to fewer optical elements, large tuning scope, high tuning efficiency and high efficiency in generating terahertz.

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 ultrasonic grating 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 obje...

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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