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Method for regulating light field polarization state distribution

A polarization state and light control technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as complex optical paths and numerous optical devices, and achieve the effect of simple operation, mature technology, and favorable light field integration

Inactive Publication Date: 2014-10-08
SOUTHEAST UNIV
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Problems solved by technology

[0006] Purpose of the invention: In order to solve the problem of complex optical path and numerous optical devices in the regulation method of the polarization state of the light field in the prior art, the present invention provides a method for regulating the distribution of the polarization state of the light field. To regulate and solve the deficiencies of the existing technology

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  • Method for regulating light field polarization state distribution
  • Method for regulating light field polarization state distribution
  • Method for regulating light field polarization state distribution

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Embodiment 1

[0026] Such as figure 1 As shown, the experimental device can be divided into three parts: beam expansion and collimation system, special shape vector light field generation system, focusing and detection system. The beam expander system is composed of a concave lens 2 and a front convex lens 3; the special shape vector light field generation system is composed of a spatial light converter 4, a computer 5, a wave plate 6 and a grating 7; the focusing and detection system is composed of a rear convex lens 8 and beam analysis Instrument 9 composition. The laser beam output from the laser is expanded into a high-quality linearly polarized beam through a lens group, and enters the spatial light converter. A hologram generated by computer control software is projected on the spatial light converter. The hologram is loaded with phase information and shape information modulated by the laser. When the beam passes through the spatial light converter, this information will be loaded on...

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Abstract

The invention discloses a method for regulating light field polarization state distribution. The method relates to a laser alignment and beam expanding system, a special shape vector light field generation system and a focusing and detecting system. The method includes the steps that a vector light field is generated by a hologram, the hologram is controlled by a computer, phase modulation information and shape modulation information are loaded, the hologram is projected to a space photoconverter, and the vector light field special in shape is generated. A focus field with the controllable polarization state distribution can be obtained at the position of a focal point through focusing. By means of the method, after the incidence vector light field with local linear polarization distribution is focused, a focal field, with hybridization distribution with linear polarization, circular polarization and elliptic polarization at the same time, on a focal plane is obtained. The shape of the incidence vector light field is changed, and the focal field with any polarization state distribution can be obtained. Compared with other common light field modulation methods, the method has the advantages that the polarization states of points can be accurately regulated; meanwhile, the method has the advantages that the light path is simple, the technology is mature, and the stability is high.

Description

technical field [0001] The invention relates to the field of polarization state distribution of light field, in particular to a method for regulating the polarization state distribution of light field. Background technique [0002] As a basic and important property of light field, polarization plays a very important role in the interaction between light and matter. Usually the polarization state is uniformly distributed on the transverse section of the light field, such as linearly polarized light, circularly polarized light and elliptically polarized light. In the past ten years, with the gradual maturity of micro-nano preparation technology and the increasing enrichment of light field control technology, researchers have generated a special light field with non-uniform distribution of polarization states on the light field section, which is called vector light field [Q .Zhan, "Cylindrical vector beams: from mathematical concepts to applications," Adv.Opt.Photon.1,1-57(200...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01
Inventor 顾兵潘洋许丹凤崔一平
Owner SOUTHEAST UNIV
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