Method for generating column vector beam by utilizing computer generated hologram

Abstract

The invention relates to a method for generating column vector beam by utilizing a computer generated hologram, comprising the following steps of: taking the light beam generated by a general single-mode laser as an input light, forming parallel beams by a beam expanding shaper, obtaining a laser TEM10 (or TEM01) mode light beam by a computer generated hologram, a Fourier transform lens, a spatialfilter and a Fourier inverse transform lens sequentially; changing the optical axis by a refractive prism, changing the beam into a linearly polarized light with a specific angle by a polarizer; andsynthesizing a column vector beam by a Mach-Zehnder interferometer. The method has the advantages of low requirement on incident beams, simple and easily operated device, high polarization of the output column vector beam, etc.

Description

A Method for Generating Cylindrical Vector Beams Using Computational Holography technical field The invention relates to the field of optical technology, in particular to a method for generating cylindrical vector beams by using computational holography. Background technique Radial polarized beams (Radial polarized beams) and azimuthal polarized beams (azimuthal polarized beams) are called cylindrical vector beams (Cylindrical polarized beams), which have a high degree of symmetry. Due to some characteristics of cylindrical vector beams, it can be applied to the fields of particle acceleration technology, optical tweezers, material processing, particle trapping and manipulation, large numerical aperture lenses, and some special measurement methods. For example, cylindrical vector beams can be applied to optical microscopy to achieve super-resolution effects, because the focus of a certain cylindrical vector beam is smaller than that of a linearly polarized beam in the same...

AI Technical Summary

Problems solved by technology

The present invention is aimed at the problem that the current method for realizing cylindrical vector beams requires high incident light and is difficult to realize. It proposes a method for generating cylindrical vector beams by using computational holography, and realizes laser TEM10 (or TEM01) by using the non-distortion characteristics of computational holography. Modular beam, and finally a cylindrical vector beam, this method has low requirements on the incident light, simple operation and adjustment, and the generated cylindrical vector beam has a high degree of polarization

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