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Aberration correction method of off-axial beam

A technology of aberration correction and light beam, which is applied in optics, optical components, instruments, etc., can solve the problems of low output beam quality and low mode matching degree of lasers, and achieve the effect of improving output beam quality and mode matching degree

Inactive Publication Date: 2017-06-09
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI +1
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Problems solved by technology

[0003] The existing laser oscillator design does not use special correction and compensation methods for the wave aberration introduced by the off-axis transmission of non-planar optical elements, but only minimizes the impact of this process by reducing the off-axis angle. Such a method The output beam quality of the laser is low and the mode matching degree is low

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0022] The present invention provides an aberration correction method for an off-axis light beam, comprising: establishing a plane rectangular coordinate system so that the deflection direction of the non-planar reflective element corresponds to a single direction of the plane rectangular coordinate system; The deflection angles are used to obtain the incident parameters along the x direction and the y direction respectively; the paraxial transmission matrix along the x direction and the y direction is calculated according to the incident parameters; according to the paraxial transmission matrix and the addition of the cylindrical lens The transmission matrix at the exit plane, yielding the focal length of the added cylind...

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Abstract

The invention discloses an aberration correction of an off-axial beam. The method comprises the steps of establishing a planar rectangular coordinate system and deflecting a nonplanar reflection component in a single direction which corresponds with the planar rectangular coordinate system; respectively obtaining incident parameters in an x-direction and a y-direction according to deflection angle of the nonplanar reflection component along a single direction; calculating near-axis transmission matrixes in the x-direction and the y-direction according to the incident parameters; and obtaining the focal length of an added cylindrical lens according to the near-axis transmission matrixes and a transmission matrix of an emergent plane after the cylindrical lens is added. According to the aberration correction method of the off-axial beam, through adding the cylindrical lens, output beam quality and mode matching degree of a laser are improved.

Description

technical field [0001] The invention relates to the field of laser and light wave aberration correction, in particular to an aberration correction method for off-axis light beams. Background technique [0002] With the rapid development of laser technology, higher requirements are put forward for the output beam quality, volume and efficiency of lasers. Under the miniaturization design requirements of laser oscillators, the bending design of the optical path is gradually increasing, especially the bending of non-planar optical elements, such as convex and concave reflections. These off-axis optical transmissions will inevitably introduce a certain degree of aberration to the transmission optical path, which greatly reduces the output beam quality and efficiency of the laser and other parameters. [0003] The existing laser oscillator design does not use special correction and compensation methods for the wave aberration introduced by the off-axis transmission of non-planar ...

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Application Information

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IPC IPC(8): G02B27/00
CPCG02B27/0025
Inventor 樊仲维郭广妍张鸿博康治军黄玉涛
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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