532nm semi-gaussian laser beam generator

Abstract

The invention provides a 532nm semi-Gaussian laser beam generator, comprising a pump light source, an alignment system, a cylindrical lens, an optical superlattice, a temperature control furnace and a filtering system, wherein the optical superlattice which is modulated in a side direction and polarized periodically is LiTaO3 and 7.505mu m in period, and used for converting 1064nm laser frequency into 532nm laser frequency; the polarization scope edges of the superlattice are distributed in an e-exponential mode in the light transmission direction of a crystal; 1064nm Gaussian laser emitted by the pump light source enters into the alignment system and then is focused in the optical superlattice by the cylindrical lens; the scope edges of the superlattice pass through the center of the Gaussian laser beam which enters into the pump light source; a high reflective mirror of 1064nm laser and the filtering system constructed by interference filters are utilized to filter out 1064nm pump lights in outgoing beams on an outgoing optical path of the superlattice so as to obtain 532nm semi-Gaussian laser. The generator is compact in structure and small in volume.

Description

532nm Semi-Gaussian Laser Beam Generator technical field The invention belongs to the technical field of lasers and relates to laser beam shaping technology, in particular to the development of a 532nm semi-Gaussian laser beam generator based on a laterally modulated optical superlattice. Background technique The semi-Gaussian laser beam is a laser beam whose lateral spatial light intensity distribution is a half-Gaussian line in one direction and a Gaussian line in the other orthogonal direction. Since the advent of the laser in the 1960s, through the continuous updating of technology, it has maintained a permanent charm in the field of scientific research and in the daily life of human beings. With the rapid development of laser technology and the expansion of laser application fields, laser beams with special light intensity distribution have become very popular. Therefore, by changing the internal structure of the laser or adding some auxiliary equipment outside the ...

AI Technical Summary

Problems solved by technology

Since the diffraction fringes in the semi-Gaussian laser beam generated by this method are caused by laser coherence, it is difficult to eliminate the diffraction fringes while ensuring the beam transmission directionality in practice.

So far, no researchers have experimentally produced a semi-Gaussian laser beam without diffraction fringes

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