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A Multi-Channel Orbital Angular Momentum Multiplexing Nonlinear Holographic Device

An orbital angular momentum, nonlinear technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of small number of channels, low signal-to-noise ratio, poor imaging effect, etc., to achieve reduced dependence, good imaging effect, and improved The effect of image quality

Active Publication Date: 2021-07-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current nonlinear holographic technology has a small number of channels at optical frequencies, a low signal-to-noise ratio, and poor imaging effects

Method used

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  • A Multi-Channel Orbital Angular Momentum Multiplexing Nonlinear Holographic Device
  • A Multi-Channel Orbital Angular Momentum Multiplexing Nonlinear Holographic Device
  • A Multi-Channel Orbital Angular Momentum Multiplexing Nonlinear Holographic Device

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Embodiment Construction

[0021] This embodiment provides a multi-channel orbital angular momentum multiplexing nonlinear holographic device, such as figure 1 As shown, it includes a near-infrared laser 1, a linear polarizer 2, a beam splitter I 3, a spatial light modulator I 4, a lens I 5, a hole 6, a mirror 7, a lens II 8, a beam splitter II 9, and a light baffle 10 , spatial light modulator II 11, lens III 12, half-wave plate 13, lens IV 14, polarizing beam splitter 15, KTP crystal 16, lens V17, dichroic mirror 18 and CCD camera 19; wherein, near-infrared laser 1 After the emitted beam passes through the linear polarizer 2, it is separated into beam I and beam II by the beam splitter I3, and the beam I is reflected by the spatial light modulator I4, and then passes through the beam splitter I3, the lens I5, and the hole 6 in sequence , reflector 7, lens II 8, merge with beam II at polarizing beam splitter 15; light baffle 10 is placed on one side of beam splitter II 9, the beam separated by beam spl...

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Abstract

The invention discloses a multi-channel orbital angular momentum multiplexing nonlinear holographic device. The light source is a near-infrared laser. The beam emitted by the near-infrared laser passes through a linear polarizer and is separated into a beam I and a beam II by a beam splitter I. The beam After I is reflected by the spatial light modulator I, it passes through the beam splitter I, lens I, hole, mirror, and lens II in sequence, and merges with the beam II at the polarizing beam splitter; a light baffle is placed on one side of the beam splitter II, and the beam II The light beam separated by the beam splitter II is reflected by the spatial light modulator II, then passes through the beam splitter II, lens III, half-wave plate, and lens IV in sequence, and merges with the beam I at the polarizing beam splitter; the combined beam passes through KTP crystal, lens V, the fundamental wave and the second harmonic are separated by the dichroic mirror, and finally recorded by the CCD camera respectively. The invention widens the number of channels on each optical frequency, has high signal-to-noise ratio and good imaging effect.

Description

technical field [0001] The invention relates to the field of optical nonlinear holography, in particular to a multi-channel orbital angular momentum multiplexing nonlinear holographic device. Background technique [0002] Holography uses holograms to reconstruct the intensity and phase information of an object. Since its invention, it has been widely used in three-dimensional holographic display, data storage, optical encryption, holographic interferometry and microscopy. Because of the unprecedented demand in information storage, people have taken advantage of the different orthogonal physical dimensions of light (including wavelength, polarization, space, and time) to multiplex multiple parallel information channels in a single hologram. Such holograms are called optical multiplexing. With holograms (OMH). [0003] In order to shape the wavefront of light generated in nonlinear optical processes, holography has been extended from the field of linear optics to nonlinear o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/22G02F1/35G02F1/355
CPCG02F1/353G02F1/3551G03H1/2294
Inventor 杨昊成方心远张勇
Owner NANJING UNIV
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