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A device and method for realizing dynamic compensation of laser beam wavefront spherical aberration

A technology of laser beam and dynamic compensation, which is applied in the direction of lasers, laser parts, phonon exciters, etc., can solve the problems of non-universality, expensive production, slowness, etc., and achieve the effect of benefiting industrial processing and power amplification

Active Publication Date: 2016-01-27
神锋(苏州)激光科技有限公司
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Problems solved by technology

Based on this theory, the previous method is usually to customize the corresponding spherical aberration compensation plate or deformable mirror to compensate the spherical aberration after accurately measuring the spherical aberration at a certain point. Aberration compensation plate or deformable mirror is not universal, and the value of spherical aberration must be measured very accurately before compensating spherical aberration, and the process of compensating spherical aberration is also cumbersome and slow

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  • A device and method for realizing dynamic compensation of laser beam wavefront spherical aberration
  • A device and method for realizing dynamic compensation of laser beam wavefront spherical aberration
  • A device and method for realizing dynamic compensation of laser beam wavefront spherical aberration

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Embodiment

[0032] The first pumping source and the second pumping source are InGaAs semiconductor laser diodes with an output wavelength of 808nm. The first optical coupling system and the second optical coupling system are composed of two lenses with focal lengths of 20mm and 40mm. Described laser resonant cavity is made up of high reflection mirror, output mirror, the first dichroic mirror and the second dichroic mirror, and the reflectivity of high reflection mirror to laser is 99.9%, and the distance of high reflection mirror and the first laser gain medium is L1= 300mm, the reflectivity of the output mirror to the laser is 20%, the distance between the first laser gain medium and the output mirror is L2=120mm, the first dichroic mirror and the second dichromatic mirror are placed at 45° to the optical path, and the reflectivity of the resonant laser It is 99.9%, and the reflectance to the pump laser is 0.5%; the first laser gain medium is located in the resonator, and the first lase...

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Abstract

The invention discloses a device for realizing laser beam wavefront spherical aberration dynamic compensation and a method thereof. A light is output from a short arm of a laser oscillator. Through a 4f imaging system, a beam is imaged at a position with the maximum negative spherical aberration and passes through a crystal with positive spherical aberration. By adjusting amplifier stage pumping current, the spherical aberration size of the crystal is adjusted to appropriately compensate the spherical aberration of the beam, thus the beam quality is improved. According to the invention, without precisely measuring the spherical aberration size of the beam, the amplifier stage pumping current is changed to compensate the spherical aberration size, which is simple and easy; for the beams with different spherical aberrations, the compensation can be carried out without customizing an expensive spherical aberration compensation plate or deformable mirror; the spherical aberration is compensated, and at the same time the beam power is magnified; and the device and the method are beneficial to industrial processing and are multi-purpose.

Description

technical field [0001] The invention relates to solid-state laser technology, in particular to a device and method for realizing dynamic compensation of laser beam wavefront spherical aberration. technical background [0002] High-power and high-brightness laser light sources have very important uses in industrial processing and military equipment. Solid-state lasers have the advantages of simple structure, stable operation, long service life and low cost. However, due to the thermal effect of the gain medium in solid-state lasers, the center temperature of the gain medium is higher than the edge temperature, which will cause the entire gain medium to resemble a lens. However, the uneven distribution of the gain medium along the radial direction will cause the optical power D of the thermal lens to also become a function D(r) of the radial coordinate r. The gain medium thus becomes a lens with spherical aberration, which degrades the quality of the beam passing through the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/13
Inventor 刘崇刘斌王毅项震
Owner 神锋(苏州)激光科技有限公司
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