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Method for designing structurally controllable tight arrangement perfect vortex array mask

A design method and mask technology, applied in the field of optical communication, can solve the problem of lack of perfect vortex array beam and so on

Active Publication Date: 2018-11-06
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] To sum up, in the field of optical communication, there is still a lack of a tightly arranged perfect vortex array beam with

Method used

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  • Method for designing structurally controllable tight arrangement perfect vortex array mask
  • Method for designing structurally controllable tight arrangement perfect vortex array mask
  • Method for designing structurally controllable tight arrangement perfect vortex array mask

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Embodiment

[0041] Taking a mask with a size of 512×512 as an example, for a laser with a working wavelength of 532nm, according to the mask transmittance function and parameter selection in the specific implementation, a tightly arranged perfect vortex array mask with controllable structure is finally obtained. figure 1 shown. This structurally controllable tight-arranged perfect vortex array mask can be realized in the far field of the spatial light modulator. Taking the PLUTO-VIS-016 spatial light modulator of German Holoeye Company as an example, the proposed tight-arranged perfect vortex array mask with controllable structure is experimentally verified.

[0042] figure 2 As shown, the experiment obtained the light intensity distribution of this structurally controllable tight-arranged perfect vortex array mask on the focal plane of the lens with a focal length of 200mm. It can be seen from the figure that by performing logical operations on two sets of coordinate matrices, triangu...

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Abstract

The invention discloses a method for designing a structurally controllable tight arrangement perfect vortex array mask. The method comprises the following steps: realizing continuation of a lattice original packet to the periphery by selecting coordinate values inside grid lattices so as to obtain a grid point coordinate matrix '; performing coordinate transformation on a coordinate transformationmatrix to obtain an arithmetic logic unit ', and performing logical operation to further obtain a structurally controllable grid array coordinate matrix; combining the structurally controllable gridarray coordinate matrix with a formula to obtain a complex transmittance function of the structurally controllable tight arrangement perfect vortex array mask; combining the complex transmittance function with a blazed grating phase factor to generate the mask. According to the method disclosed by the invention, by utilizing a computational holography principle, the structurally controllable tightarrangement perfect vortex array mask is obtained by virtue of a global hybrid phase mask technology and computer coding, so that the perfect vortex array mask is generated in a far field. The perfect vortex array has the characteristic of structural controllability, so the mask has important application value in the field of photo-communication.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a design method of a tightly arranged perfect vortex array mask plate with controllable structure. Background technique [0002] In the past few decades, optical vortices have become a research hotspot in many fields. It has important application value in optical communication, particle manipulation, quantum information coding and other fields. The perfect optical vortex [Opt.Lett.38:534(2013)] has important frontier research significance in the field of fiber-coupled communication because the radius of the optical ring does not depend on the topological charge value. In 2014, the research group of Leslie A. Rusch realized the application of perfect vortex in optical communication for the first time [Opt.Express 22:26117 (2014)], and realized the optical fiber communication based on the perfect vortex beam of 36 OAM states. Subsequently, in order to improve the communicatio...

Claims

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Application Information

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IPC IPC(8): G02B27/00G02B27/09
CPCG02B27/0012G02B27/0938
Inventor 李新忠张浩王亚坤马海祥
Owner HENAN UNIV OF SCI & TECH
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