Method and device for generating high-energy terahertz pulses

A terahertz pulse and generating device technology, which is applied in the field of high-energy optical terahertz radiation, can solve problems such as low terahertz pulse energy, and achieve the effects of stable and efficient operation, simple method and stable performance

Inactive Publication Date: 2014-11-19
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the problem of low energy of terahertz pulses generated by existing optical methods, the present invention proposes a large-energy terahertz pulse generation method and device that uses homologous pulses to pump nonlinear crystals to generate terahertz pulses through optical rectification

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  • Method and device for generating high-energy terahertz pulses
  • Method and device for generating high-energy terahertz pulses
  • Method and device for generating high-energy terahertz pulses

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Embodiment Construction

[0030] The following describes the present invention in detail starting from the principle of the present invention in conjunction with the accompanying drawings.

[0031] The principle of the present invention: the present invention utilizes a new technology of coherent synthesis of terahertz pulses generated through optical rectification by pumping nonlinear crystals with homologous pulses. Optical coherent combination technology is an effective method to generate high-energy ultrashort pulses. There are two necessary conditions for coherent combination between pulses; first, the same repetition frequency; second, the same carrier envelope phase difference. The mode-locked pulse can be regarded as composed of a series of discrete and equally spaced frequencies in the frequency domain. Since these discrete and equally spaced frequencies are like comb teeth, the mode-locked spectrum is called an optical frequency comb (Optical Frequency Comb). Comb). Its frequency can be expr...

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Abstract

The invention provides a method and a device for generating high-energy terahertz pulses. A beam of high-energy femtosecond pulses is uniformly divided into two or more beams, the beams of high-energy femtosecond pulses are emitted to ZeTn crystals with identical parameters respectively, terahertz pulses are generated in the crystals by the aid of optical rectification processes of the femtosecond pulses respectively, and coherently combined terahertz pulses can be obtained by enabling the generated terahertz pulses to arrive at a detector simultaneously through time delay adjustment. According to the method and the device for generating the high-energy terahertz pulses, two or more stages of optical rectification processes are connected in parallel, and the terahertz pulses are output through coherent combination, so that the defect that laser energy cannot by fully used due to the fact that the damage threshold of a single crystal is low is overcome.

Description

technical field [0001] The invention belongs to high-energy optical terahertz radiation technology, and in particular relates to a method and device for generating terahertz radiation based on optical rectification and optical coherent synthesis. Background technique [0002] Terahertz (THz) radiation usually refers to electromagnetic waves from 0.1 to 10 THz, and its wave band is between microwave and far infrared. On the electromagnetic spectrum, the infrared and microwave radiation technologies on both sides of the THz band are very mature, but the THz technology is not commensurate with these mature technologies on the adjacent bands. From the characteristics of terahertz spectrum, compared with microwave and millimeter wave, terahertz wave has the characteristics of high frequency and short wavelength, which can make electronic equipment have larger communication bandwidth, higher resolution, and can realize miniaturization and light weight; Compared with light waves, ...

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Application Information

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IPC IPC(8): G02F1/35H01S1/02
Inventor 刘红军李少鹏孙启兵黄楠
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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