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Two-dimensional coding device and method for spin angular momentum of light field

A two-dimensional coding and angular momentum technology, which is applied in the field of photon spin angular momentum regulation, achieving the effect of wide application range, mature generation technology and high efficiency

Active Publication Date: 2017-12-29
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the two-dimensional encoding of photon spin angular momentum using uniaxial crystals and vector light fields has not been reported yet.

Method used

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  • Two-dimensional coding device and method for spin angular momentum of light field
  • Two-dimensional coding device and method for spin angular momentum of light field
  • Two-dimensional coding device and method for spin angular momentum of light field

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 Shown is a device that uses a uniaxial crystal to realize two-dimensional encoding of photon spin angular momentum, including a uniaxial crystal 2, a λ / 4 wave plate 3, a polarizer 4, A beam analyzer 5 and a computer 6; a radially varying hybrid polarization vector light field 1 with linear polarization, circular polarization and elliptical polarization distribution is incident on the uniaxial crystal 2, and the uniaxial crystal 2 is placed on the propagation direction of the beam, And the crystal optical axis of the uniaxial crystal 2 is perpendicular to the beam propagation direction, the parallel beam with a size of tens of microns is incident from the incident surface of the uniaxial crystal 2, and is transmitted along the direction perpendicular to the crystal optical axis, from the uniaxial crystal 2 emerge from the exit surface, by changi...

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Abstract

The invention discloses a two-dimensional coding device and method for the spin angular momentum of a light field, and the method comprises the steps: achieving the different two-dimensional distribution of the photon spin angular momentum on a cross section of a radial change hybrid polarization vector light field through an uniaxial crystal; and achieving the coding from the photon spin angular momentum to digital logic '0'and '1'. The method provided by the invention is provided with the uniaxial crystal, a quarter-wave plate, a polaroid and a CCD sensor, wherein the uniaxial crystal, the quarter-wave plate, the polaroid and the CCD sensor are sequentially set from the left side to the right side in the propagation direction of a light beam. Compared with other common coding methods, the method is simple in optical path, is convenient and reliable, is easy for adjustment, and has the potential application perspective in the technical field of light field communication.

Description

technical field [0001] The invention relates to a device and an encoding method for realizing two-dimensional encoding of spin angular momentum of light field by using a uniaxial crystal, and belongs to the technical field of photon spin angular momentum control. Background technique [0002] Light field regulation mainly involves the regulation of frequency, phase, amplitude and polarization state. Among them, the control technology and application of the frequency, phase and amplitude of the light field are relatively mature, but the control of the polarization state of the light field is relatively difficult. As a new type of light field, the vector light field has a spatially variable polarization distribution, and can use the "arbitrary polarization distribution vector beam generation device" (patent No. CN101178484A) to generate a hybrid with linear polarization, circular polarization and elliptical polarization Polarized vector light field. [0003] Due to the speci...

Claims

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Application Information

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IPC IPC(8): G02B27/28
CPCG02B27/286
Inventor 文一峰王旭亮顾兵芮光浩崔一平
Owner SOUTHEAST UNIV
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