Arbitrary Wavelength Semi-Gaussian Laser Beam Generator

A laser beam and generator technology, applied in the laser field, can solve the problems of semi-Gaussian laser beam diffraction, etc., and achieve the effects of stable transmission characteristics, stable beam transmission, and easy processing.

Active Publication Date: 2017-08-25
EAST CHINA NORMAL UNIV
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Problems solved by technology

In addition, the semi-Gaussian laser beam generated by this technology will undergo derivation when it is transmitted in free space.

Method used

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  • Arbitrary Wavelength Semi-Gaussian Laser Beam Generator
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  • Arbitrary Wavelength Semi-Gaussian Laser Beam Generator

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Embodiment Construction

[0016] The specific embodiments of the present invention will be described in detail with reference to the technical solutions and the accompanying drawings.

[0017] Take the helium-neon laser with a wavelength of 632.8nm as the incident laser light source as an example:

[0018] (1) The coherence attenuator implemented by the present invention is designed as follows:

[0019] Based on the knowledge of optical principles and the processing method of wave optics, the basic principle of the present invention for generating half-Gaussian laser beams is theoretically analyzed. Define the coordinates of the plane where the coherence attenuator and the opaque sheet (blade) lie as (x 0 ,y 0 , 0), the coordinates of the plane behind the blade at a distance z are (x, y, z). Optical field complex amplitude U of a collimated Gaussian beam incident on the coherence attenuator plane 0 (x 0 ,y 0 ,0) is:

[0020]

[0021] where w 0 is the beam waist radius of the collimated laser...

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Abstract

The invention discloses arbitrary wavelength semi-Gaussian laser beam generator, belonging to the laser beam shaping technology field. The arbitrary wavelength semi-Gaussian laser beam generator consists of an incident laser light source, a collimator system, a coherence degree attenuator, and a non-transparent sheet (blade). The laser beam shaping method comprises steps of transmitting parallel light which is converted by an incident laser light source through the collimator system to the coherence degree attenuator, and using the non-transparent sheet (blade ) to cut half of the light outputted from the coherence degree attenuator, wherein the outputted light beam is the semi-Gaussian laser beam which is transmitted stably in the space. The advantages of the invention are that only one coherence degree attenuator and the non-transparent sheet (blade) can realize the generation of the semi-Gaussian which can be stably transmitted in the free space, that the generator has no preference for the wavelength of the incident laser source, the light beam transmission is stable, the application range is wide and the laser beam generator is solid and the operation is easy.

Description

technical field [0001] The invention belongs to the field of laser technology and relates to laser beam shaping technology, in particular to a semi-Gaussian laser beam generator of arbitrary wavelength, which is suitable for laser physics, atomic and molecular optics, biophysics, quantum information, optical measurement and detection, etc. requiring asymmetric laser beams field. Background technique [0002] Half-Gaussian laser beam is a special asymmetric laser beam, its lateral spatial light intensity distribution is a half-Gaussian line shape in one direction, and a Gaussian line shape in the other orthogonal direction. Since the advent of lasers in 1960, related technologies have been continuously updated, and lasers have been widely used in human production and life activities. Lasers with conventional fundamental mode output and related technologies and theoretical research have developed rapidly, and the application fields of lasers have been fully expanded and incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09
CPCG02B27/0927
Inventor 叶张东尹亚玲方彬茅志翔夏勇郭超修印建平
Owner EAST CHINA NORMAL UNIV
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