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Hollow beam gas laser

A laser, hollow technology, used in the field of optics and optical engineering, can solve the problem of high cost

Inactive Publication Date: 2008-07-30
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Nd:YVO 4 Crystals and semiconductor lasers for pumping are expensive

Method used

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Embodiment Construction

[0008] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0009] Axisymmetric circular annular curved surface reflector 1 of the present invention adopts circular optical glass or quartz block as substrate, for He-Ne laser and CO 2 The laser is suitable, and the round copper block with good density and high hardness is used as the substrate, which is suitable for high output CO 2 The laser is applicable, and their outer edge size is consistent with our requirements. Use a hole cutting device to cut the middle part according to the inner edge size of the ring mirror, but the middle part should be glued together with the ring block for grinding processing. The abrasive tool for grinding the mirror surface is made of low-carbon steel material and processed by CNC machine tools according to the design. Since the mirror surface does not have a single center of curvature, the abrasive tool does not have ...

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Abstract

The invention relates to a hollow beam gas laser, which belongs to the field of optics and optical engineering. The generation of a hollow laser beam can be divided into two kinds, wherein one is transforming a known beam, which is of technical difficulty in either the restrict requirement for the properties of the known beam or complex auxiliary optical component; and the other kind is directly generating and outputting the hollow beam from a laser, which is of a higher cost of the crystal for the solid device and the semiconductor laser for the pumping. The laser of the invention belongs to the first kind, and the invention relates to a method and device for outputting a hollow gas laser beam. The device has simple construction and stable output. The hollow carbon dioxide laser in watt level and the hollow helium neon laser in milliwatt level can be focused to a hollow beam at a very small dark field size, which can be used as optical tweezers, optical wrench, optical guide tube, etc. The laser is enabled to operate when clamped. Large-scale carbon dioxide laser can be applied in the aspect of material processing.

Description

technical field [0001] The invention relates to the field of optics and optical engineering, mainly a method and a device for obtaining a gas laser outputting a hollow laser beam by configuring a hollow conical resonant cavity and exciting a discharge. Background technique [0002] The hollow laser beam is a beam with a dark area with zero light intensity in the center of the beam. It is mainly used in photolithography, material processing, fluorescence microscopy, optical tweezers, and optical wrenches. At present, there are two types of hollow laser beam generation. One is obtained by transforming the known beam through complex technology, such as using a ferroelectric liquid crystal binary spatial light modulator to transform the collimated beam split by a polarization beam splitter. The s-polarized single-mode diode laser becomes p-polarized light, which is then focused by a lens after passing through a polarization beam splitter, and a hollow laser beam is obtained near...

Claims

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Application Information

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IPC IPC(8): H01S3/08H01S3/223H01S3/03H01S3/09H01S3/00
Inventor 刘静伦郭俊平李育德陈梅
Owner SICHUAN UNIV
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