Light focusing cavity of laser

A condensing cavity and laser technology, which is applied in lasers, laser parts, phonon exciters, etc., can solve the problem of low efficiency of concentrating cavity and achieve the effect of high concentrating efficiency.

Inactive Publication Date: 2010-09-22
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0011] After long-term research on the light-gathering principle of lasers, the inventor has invented a light-gathering cavity with higher light-gathering efficiency than double elliptical cylinders. The shortcomings of light leakage on the upper and lower sides of the YAG rods in the cylindrical concentrating cavity, and the shortcoming of the low efficiency of the common intersecting cylindrical concentrating cavity, so it is called a tight-wrapped intersecting circular concentrating cavity

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Embodiment Construction

[0019] Such as image 3 As shown, the concentrating cavity provided by the present invention includes a concentrating cavity body 1, a YAG rod 4 and two lamps 2, 3; the shape of the concentrating cavity body 1 is formed by two intersecting cylindrical surfaces, and the two intersecting cylindrical surfaces Symmetrically arranged, and their axes are parallel, the cross-section radii of the two intersecting cylindrical surfaces are equal, both are 15-35mm; side, and symmetrically distributed. The axes of the focusing cavity 1, the YAG rod 4 and the two lamps 2 and 3 are all parallel. The two lamps 2, 3 can be xenon lamps or helium lamps.

[0020] This new type of concentrating cavity is fundamentally different from the double elliptical cylindrical concentrating cavity, and also different from the general intersecting cylindrical concentrating cavity. It is a tightly wrapped intersecting circular concentrating cavity with elliptical properties.

[0021] The radius of the inte...

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Abstract

The invention discloses a light focusing cavity of a laser, which comprises a light focusing cavity body, a YAG bar and two lamps, wherein the YAG bar is arranged in the center of the light focusing cavity body, the two lamps are arranged on the two sides of the YAG bar and are symmetrically distributed, and the axis of the light focusing cavity body, the axis of the YAG bar and the axes of the two lamps are in parallel with each other. The invention is characterized in that the shape of the light focusing cavity body is formed by two intersecting cylindrical surfaces, the two intersecting cylindrical surfaces are symmetrically arranged, the radiuses of the cross sections of the two intersecting cylindrical surfaces are equal and the radius is 15-35mm. The invention overcomes the defects that the upper side and the lower side of the YAG bar of double elliptic cylindrical surfaces leak light and the efficiency of the light focusing cavity with common intersecting cylindrical surfaces is not high, and has the advantages that the light focusing cavity has elliptic light focusing features even though the shape of the light focusing cavity is non-elliptic and the light focusing efficiency is higher.

Description

technical field [0001] The invention relates to solid laser technology, in particular to a laser light collecting cavity. Background technique [0002] Among the 300W-500W laser welding and laser cutting machines currently on the market, YAG solid-state lasers are the most used, accounting for about 90% of the market share. In solid-state YAG lasers, about 90% of the concentrating cavities used are double elliptical gold-plated concentrating cavities, and the remaining 10% are ceramic tight-packed cavities. [0003] Although the ceramic compact cavity has the advantages of high light-gathering efficiency, long service life, and convenient maintenance, but due to its large thermal lens effect, the quality of the laser output beam is unstable, and the focus will change during the laser processing process, so it is more than 300W. Ceramic tight cavities are not used in YAG lasers. [0004] The gold-plated elliptical light concentrating cavity adopts the method of placing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/0915
Inventor 肖金陵李家伟
Owner HUAZHONG UNIV OF SCI & TECH
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