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Transverse excitation atmosphere CO2 laser with high repetition frequency

A high repetition frequency, laser technology, applied in the field of laser, can solve the problems of low repetition frequency (tens to hundreds of hertz, large volume, etc., to achieve the effect of small size, broad application prospects, and volume reduction

Inactive Publication Date: 2012-05-30
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This laser device, to a certain extent, solves the problem of traditional high repetition rate transverse excitation of atmospheric pressure CO 2 The problem of large volume and low repetition rate (tens to hundreds of Hz) in lasers

Method used

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  • Transverse excitation atmosphere CO2 laser with high repetition frequency
  • Transverse excitation atmosphere CO2 laser with high repetition frequency
  • Transverse excitation atmosphere CO2 laser with high repetition frequency

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Embodiment

[0044] The working medium of the laser is CO 2 , N 2 The mixed gas with He, the working pressure is 100kPa, the laser adopts the ultraviolet corona pre-ionization structure, and the discharge direction is perpendicular to the optical axis direction. The shell material of the laser cavity is stainless steel, in which the main discharge electrode, pre-ionization electrode, turbocharger fan and heat exchange system are mainly placed. The electrodes are Ernst compact electrodes for excellent electric field uniformity. Pre-ionization uses quartz tube ultraviolet corona pre-ionization. Before the main discharge, after the pre-ionization discharge, part of the gas between the main electrodes is ionized, the impedance between the electrodes decreases, and the main discharge glow discharges, which is uniform and stable. The main discharge electrode spacing is 10mm, the electrode width is 10mm, the electrode length is 120mm, and the working gas discharge gain volume is 12×10 3 mm 3 ...

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Abstract

The invention discloses a transverse excitation atmosphere CO2 laser with high repetition frequency, relating to the laser technology. The laser is composed of a seal cavity, an optical resonant cavity, an ultraviolate corona preionization and primary discharge electrode, a turbocharged blower fan and a heat radiation cooling system, wherein, the turbocharged blower fan comprises an alternating current motor, an impeller, a pumping chamber and a compression nozzle. When using the laser, a motor in the turbocharged blower fan drives a direct connection impeller to rotate at a high speed, pressure of working gas is increased through a turbo and is sprayed out from the nozzle at a high speed to flow through a primary electrode, a high cleaning coefficient of the working gas is realized in compact space, and stable output of a high repetition frequency laser pulse is obtained. The pulse repetition frequency is larger than 2 kHz, and the laser is a transverse excitation atmosphere CO2 laser with highest pulse repetition frequency in China at present time and has good application prospect in laser object indication and alarm.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a high repetition rate transverse excitation atmospheric pressure CO 2 The laser can realize stable operation with high repetition rate. Background technique [0002] In 1970, Beaulieu et al. reported for the first time that a uniformly excited pulse transversely excited CO 2 laser. Due to the use of transverse excitation, under the same gain length and gas pressure, compared with longitudinal excitation, the discharge voltage of the laser can be greatly reduced. On the one hand, it reduces the requirements on the insulation strength of the power supply and the system; on the other hand, using a lower discharge voltage can effectively reduce the E / N value of the discharge and improve the efficiency of the discharge excitation. TEA CO 2 Lasers are generally excited by high-voltage narrow pulses (the width of the discharge pulse is generally less than microseconds), and there is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/041H01S3/08H01S3/038
Inventor 郑义军谭荣清王东蕾刘世明张阔海
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI