Cat's eye chamber helium neon laser

A helium-neon laser and laser technology, which is applied in the field of laser light sources, can solve the problems of difficult adjustment of helium-neon laser light sources, difficult to guarantee stability, small temperature drift, etc., and achieve the effects of simple structure, low processing difficulty and stable performance.

Inactive Publication Date: 2005-03-30
TSINGHUA UNIV
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Problems solved by technology

[0005] The present invention aims to use the antiparallel reflectivity of the cat's eye reverser to overcome the technical defects of the existing helium-neon laser light sources, which are difficult to adjust, difficult to guarantee stability, and large temperature drift, and to invent an easy-to-adjust, high-stability, small temperature drift Cat's eye helium-neon laser light source

Method used

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  • Cat's eye chamber helium neon laser
  • Cat's eye chamber helium neon laser
  • Cat's eye chamber helium neon laser

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Embodiment Construction

[0021] The present invention lists six specific implementations of the cat's-eye cavity laser, and the specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] figure 1 It is a structural schematic diagram of a cat's eye reverser, which is composed of a convex lens 1 and a concave mirror 2, the apex of the concave mirror 2 is located at the focal point of the convex lens 1 or within the focal length.

[0023] figure 2 It is a schematic diagram of the structure of another cat’s eye reverser. It is composed of a lens group 3 composed of two or more lenses and a concave mirror 2. The apex of the concave mirror 2 is located at the focal point or within the focal length of the lens group. The lens group The role of is to eliminate aberration.

[0024] image 3 It is a structural schematic diagram of an embodiment of an all-external-cavity cat-eye cavity He-Ne laser. It is a cat’s-eye cavity helium-...

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Abstract

The invention includes discharge tube of helium-neon laser and two cavity mirrors setup at two ends of the discharge tube. Technical features are that cats eye reversal unit is adopted for one or to cavity mirrors. The cats eye reversal unit is composed of one convex lens or composed of lens group and a concave mirror. Vertex of convex lens is placed within focal length of lens group or at focus. The invention overcomes disadvantages of difficult to be adjusted and to ensure stability, and large temperature drift. Transverse modes of output laser light can be selected in order to output base transverse mode. Under large gain, free of adjustment is possible. The invention also discloses dedicated device for testing cats eye reversal unit.

Description

technical field [0001] The invention relates to a laser, in particular to a helium-neon laser, and belongs to the technical field of laser light sources. Background technique [0002] The resonant cavities of existing He-Ne lasers are all composed of plane mirrors or concave mirrors, the most typical ones are flat-flat cavity, flat-concave cavity and concave-concave cavity. The current laser resonators have several shortcomings that are difficult to overcome: 1. Theoretically, to make the laser work ideally, it is necessary to adjust the two cavity mirrors that make up the resonator to be completely parallel, but it is impossible to achieve in practice Yes, so the adjustment of the laser becomes a difficult task. 2. In many industrial fields with relatively harsh environments, when the laser is disturbed, the parallelism of the two cavity mirrors will be affected, which will reduce the output power of the laser a lot and even cause the laser to fail to work. 3. When the am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/223
Inventor 张书练许志广李岩杜文华
Owner TSINGHUA UNIV
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