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Transverse flow gas mechanical Q switched pulse laser

A laser and laser technology, applied in the direction of lasers, laser parts, phonon exciters, etc., can solve the problems of large energy loss, powerlessness, and complicated implementation process, and achieve high energy extraction efficiency, simple implementation, and optical wavelength matching Good results

Inactive Publication Date: 2015-01-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Pulsed lasers, on the other hand, have higher peak power but are not as energy efficient overall
[0003] At present, there are many methods of continuous wave pulse Q-switching, such as: acousto-optic Q-switching, dye Q-switching, chopping Q-switching and other methods. These methods require certain special devices, either the implementation process is more complicated, or the energy loss is greater.
On high-energy cross-flow pneumatic lasers, methods such as dye Q-switching are even more powerless.

Method used

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  • Transverse flow gas mechanical Q switched pulse laser
  • Transverse flow gas mechanical Q switched pulse laser

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present invention consists of a gain medium generator 1, an upstream gain region 2, a downstream gain region 3, a downstream laser cavity A, a beam shrinkage system 5, a mechanically modulated chopper 6, a pair of vertically arranged return mirrors 7, an upstream unstable Chamber assembly B constitutes (as figure 1 shown).

[0027] In the downstream gain region 3, the laser beam is focused outside the gain region by the first concave total reflection mirror to form a real focus, and the chopper 6 is placed at the real focus, and the divergent beam passes through the second concave total reflection mirror 9 after passing through the real focus. The mirror returns according to the original optical path to form an optical resonant cavity A;

[0028] Under the mechanical modulation of the chopper 6, laser oscillation is formed in the optical resonator A, and the pulsed laser is output through the output coupling mirror 4-1.

[0029] Gain medium generator 1 has differe...

Embodiment 2

[0031] like figure 2 As shown, the difference from Embodiment 1 is that if the upstream gain zone 2 is longer along the airflow direction and is twice as high as the gain zone, a folded unstable cavity can be used to expand the length of the upstream gain zone along the flow direction of the gain medium Double the upstream energy while using the laser beam folding method in the upstream. In this way, the upstream unstable optical resonant cavity B is composed of a concave mirror 8-1, a double mirror 7, a convex mirror 8-2 and a scraper mirror 8-3. The two folding mirrors 7 are placed on the side of the downstream gain region 3, while the concave mirror 8-1, the convex mirror 8-2 and the scraper mirror 8-3 are placed on the side of the downstream laser injection.

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Abstract

The invention relates to a transverse flow gas pulse laser implementation method. In the flowing direction of gain mediums, gain areas are divided into the upstream gain area and the downstream gain area, laser resonant cavity assemblies are arranged on the two sides of the downstream gain area so that a resonant cavity can be formed, and laser pulses can be output in a mechanical modulation method. A concave mirror, a convex mirror and a scraper mirror are arranged in the upstream gain area so that a positive branch unstable cavity assembly can be formed, and a small hole is reserved in the center of the concave mirror. According to lasers output from the downstream in a resonance mode, the spot size is reduced through a beam shrinking optical system, shrunken laser beams are injected to the upstream gain area through the small hole of the concave mirror of the upstream gain area, the injected laser beams are oscillated in an upstream positive branch unstable cavity, laser energy and beam spots can be amplified, and high-energy pulse laser output is achieved.

Description

technical field [0001] The present invention relates to the implementation method of pulsed laser, specifically a method for pulsed cross-flow pneumatic laser, which is mainly used for CO 2 Lasers, chemical oxygen iodine lasers (COIL), HF / DF lasers and other gas lasers. Background technique [0002] Lasers can be divided into pulsed lasers and continuous lasers in terms of working time. The two types of lasers have different applications and different technical advantages. In general, pulsed lasers are more complicated than continuous wave lasers, and certain Q-switching devices are required to realize pulsed lasers. On the other hand, pulsed lasers have high peak power but are not energy efficient overall. [0003] At present, there are many Q-switching methods for continuous wave pulses, such as: acousto-optic Q-switching, dye Q-switching, chopping Q-switching and other methods. These methods require certain special devices, either the implementation process is complicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/11
Inventor 公发全刘万发王元虎多丽萍韩新民李义民贾春燕李国富李刚谭彦楠刘通
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI