THz wave generating device based on optical rectification Cherenkov effect

A generation device and optical rectification technology, applied in the direction of solid-state lasers, etc., can solve the problems of polishing difficulty, THz wave attenuation, and inability to guarantee surface flatness, etc., and achieve the effects of compact structure, improved output efficiency, and small volume
CN103594908AInactive Publication Date: 2014-02-19THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
Publication Date
2014-02-19
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a THz wave generating device based on an optical rectification Cherenkov effect. The THz wave generating device based on the optical rectification Cherenkov effect is characterized in that the THz wave generating device comprises a femtosecond laser device, a cylindrical lens, a crystal-silicon prism array coupling body, a pneumatic infrared detector, a detecting unit and a time delay system. The femtosecond laser device is a full-automatic integrated broadband femtosecond laser device, the band width and the central wavelength of the femtosecond laser device can be adjusted automatically, the femtosecond laser device outputs optical pulses, the central wavelength of the optical pulses is 800nm, the optical pulses are in horizontal polarization, the space mode of the optical pulses is TEM00, the pulse width of the optical pulses is 18fs, and the diameter of beams is 2mm. The coupling body comprises a crystal and a plurality of blocky silicon prisms, the crystal is a slice-shaped cuboid, and all the silicon prisms are fixed on the upper surface and the lower surface of the crystal. The detecting unit comprises a detecting crystal and a phase-locked amplifier. The time delay system is matched with the detecting unit to carry out the measurement of the THz spectrum. The THz wave generating device based on the optical rectification Cherenkov effect improves the efficiency of converting pump light into THz waves, enlarges the effective acting distance of the optical pulses and the crystal, lowers the limitation to the coupling output of the THz waves, and improves the output efficiency of the THz waves.
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Description

technical field

[0001] The invention relates to a THz wave generating device based on the optical rectification Cherenkov effect. Background technique

[0002] THz waves have many characteristics such as wide frequency bandwidth, good directivity, small scattering, and high spatial resolution. THz science and technology have shown broad application prospects in the fields of material analysis, communication, and investigation, and have become a very attractive research field. Among them, THz wave generation technology is the most critical research content, which is the prerequisite for the application of THz wave in practice.

[0003] Photonics-based THz wave generation technology can achieve high-frequency broadband and high-coherence THz wave output at room temperature. The methods include optical rectification effect, optical parametric oscillation, optical difference frequency, etc. These methods are mainly based on the interaction between laser and nonlinear crystal, t...

Claims

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