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Method and device for producing vector vortex beam

A vortex beam and vector technology, applied in the direction of optics, optical components, instruments, etc., to achieve the effect of good versatility, strong practicability, and good stability of the optical path

Active Publication Date: 2017-01-11
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0006] In order to solve the problem of how to use a relatively simple method and device to generate a high-quality vector vortex beam, the present invention proposes a method and device that can generate a vector vortex beam

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  • Method and device for producing vector vortex beam
  • Method and device for producing vector vortex beam
  • Method and device for producing vector vortex beam

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Embodiment Construction

[0035] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] like figure 1 As shown, a device for generating a vector vortex beam is composed of a laser 1, a beam expander 2, a pinhole 3, a collimator 4, an aperture stop 5, a polarizer 6, and a depolarizing beam splitter 7 , reflective pure phase liquid crystal spatial light modulator 8, PC control terminal 9, 1 / 4 wave plate 10, radial analyzer 11, polarization rotator 12, converging mirror 13 and CCD camera 14.

[0037] Laser 1, beam expander 2, pinhole 3, collimator 4, aperture stop 5, polarizer 6, depolarizing beam splitter 7 and reflective phase-only liquid crystal spatial light modulator 8 are coaxially arranged in sequence, PC The control terminal 9 is connected to the reflective pure phase liquid crystal spatial light modulator 8; the incidence of the 1 / 4 wave plate 10, the radial analyzer 11, the polarization rotator 12, the co...

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Abstract

A method and a device for producing vector vortex beam are belonging to the vector vortex beam technology area, to solve the problem of how to adopt a simple method and device to produce high quality vector vortex beam, the emergent laser beam from the laser under collimation and beam expanding after passing beam expander and collimating lens, and arranges pinhole at the focal position between beam expander and collimating lens for laser beam filtering; light beam after collimation and beam expanding is normally incidented on polarizer through aperture diaphragm, and the linearly polarized lights generated is incidented on the depolarization beam splitter, linearly polarized lights through transmission of depolarization beam splitter reaches the effect window of the reflecting pure-phase liquid crystal spatial light modulator, and conducts phase modulation for the linearly polarized lights by load grayscale images of PC control terminal, to acquire the relevant vortex beam; light path of vortex beam after depolarization beam splitter reflects, and becomes circularly polarized light after 1 / 4 wave plate to incident on radial analyzer, to generate radial polarized vortex beam; and acquires vector vortex beam in need through polarization rotator.

Description

technical field [0001] The invention relates to a method and a device for generating a vector vortex beam, belonging to the technical field of vector vortex beams. Background technique [0002] Vector vortex beam refers to a new type of beam that has both non-uniform polarization state and helical phase structure in the beam cross section. Compared with other beams, the vector vortex beam has many special properties, and has potential application value in the fields of super-resolution imaging, laser precision machining, particle manipulation, data storage and remote sensing. Research on the generation method of vector vortex beam It has attracted more attention. At the same time, many new generation methods have been proposed, such as intracavity Sagnac interferometry, conical Brewster prism method, spiral phase plate method, partition delay method, interferometry and subwavelength grating method. [0003] Li Jianlang, Shanghai Institute of Optics and Fine Mechanics, Chin...

Claims

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Application Information

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IPC IPC(8): G02B27/28
CPCG02B27/286
Inventor 付跃刚李亚红贺文俊刘智颖刘家源赵玄
Owner CHANGCHUN UNIV OF SCI & TECH
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