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Method and apparatus for generation of radial polarized cosine Gaussian Shell Model (GSM) light beam

A Gaussian beam and generating device technology, applied in optics, optical components, instruments, etc., can solve the problems such as the method of generating radially polarized cosine Gaussian Shell mode beams that have not yet been found, and achieve the effect of consistent experimental results

Active Publication Date: 2016-05-25
NANJING UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

[0005] However, there is no relevant record on the method of generating radially polarized cosine Gaussian Shell mode beams in the existing literature

Method used

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  • Method and apparatus for generation of radial polarized cosine Gaussian Shell Model (GSM) light beam
  • Method and apparatus for generation of radial polarized cosine Gaussian Shell Model (GSM) light beam
  • Method and apparatus for generation of radial polarized cosine Gaussian Shell Model (GSM) light beam

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Embodiment

[0035] In this embodiment, based on the unified theory of partial coherence and partial polarization, the 2×2 order cross spectral density matrix of random electromagnetic beams The matrix of can be expressed as:

[0036] Q ^ ( r 1 , r 2 ) = E x * ( r 1 ) E x ( r 2 ) ...

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Abstract

The invention relates to a method and apparatus for generation of a radial polarized cosine Gaussian Shell Model (GSM) light beam. The method comprises the steps: performing beam expanding on laser, and modulating the correlation characteristics of the light beam through a spatial light modulator to obtain a light beam with the correlation characteristics of cosine Gaussian; performing space polarization regulation and control on the light beam to obtain a radial polarized beam; reducing the spatial correlation characteristics of the radial polarized beam to obtain a noncoherent cosine Gaussian correlation beam; obtaining a linearly polarized cosine Gaussian correlation Gaussian beam after the noncoherent cosine Gaussian correlation beam is focused through a lens and is filtered through a Gaussian amplitude filter plate; and obtaining a radial polarized cosine GSM light beam after the linearly polarized cosine Gaussian correlation Gaussian beam passes through a radial polarized light converter. The invention provides a novel light beam generation method, further promoting the research on transmission, imaging and matter interaction for a special coherence light beam, and expanding the types of light beams.

Description

technical field [0001] The invention relates to a polarized cosine Gaussian Shell mode beam, in particular to a method and a device for generating a radially polarized cosine Gaussian Shell mode beam. Background technique [0002] In optics and laser applications, coherence and polarization are two important properties of laser beams. In the past, the polarization and coherence characteristics of laser beams were mostly studied separately. In recent years, partially coherent vector beams have attracted widespread attention. Vector beams are also called electromagnetic beams. Compared with scalar beams, electromagnetic beams can describe more light source information. [0003] Due to the special polarization properties of radially polarized light beams, relative to uniformly polarized light fields, such as linear polarization, elliptical polarization, and circular polarization, the polarization state distribution of radially polarized light is non-uniform, and its electric f...

Claims

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Application Information

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IPC IPC(8): G02B27/28G02B27/09
CPCG02B27/0927G02B27/0938G02B27/286
Inventor 王静朱时军李振华
Owner NANJING UNIV OF SCI & TECH
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