A method for suppressing crosstalk in non-aligned oam multiplexing systems based on rvp modulation

A non-alignment and multiplexing technology, applied in the field of optical communication, can solve the problem of reducing the overlapping area of ​​light spots

Active Publication Date: 2020-07-07
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method based on RVP modulation to suppress the crosstalk of non-aligned OAM multiplexing system, which solves the problem of channel crosstalk caused by non-alignment in the OAM state communication system. The combination of conversion technology makes the focused spots of different OAM state beams distributed to the horizontal and vertical positions, reduces the spot overlap area, achieves the separation effect, and overcomes the spot overlap caused by non-alignment

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  • A method for suppressing crosstalk in non-aligned oam multiplexing systems based on rvp modulation
  • A method for suppressing crosstalk in non-aligned oam multiplexing systems based on rvp modulation
  • A method for suppressing crosstalk in non-aligned oam multiplexing systems based on rvp modulation

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[0037] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0038] figure 1 A schematic diagram of a method for suppressing channel crosstalk in a non-aligned OAM communication system using a radius-variable phase is shown. In the case of non-alignment, the focused spots using the coordinate transformation method will overlap, which increases the difficulty of OAM state separation. At the same time, due to the superposition of light spots, crosstalk occurs between channels. The position of the focus spot can be adjusted by using the radius variable phase, thus reducing the superposition of the spot. Inter-channel interference is reduced due to the reduction of spot overlap areas. The invention has the advantages of less exper...

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Abstract

The invention discloses a method for inhibiting crosstalk of a non-alignment OAM multiplexing system based on RVP modulation, for solving the problem of channel crosstalk under the non-alignment condition of an OAM multiplexing communication system transmitting-receiving device. According to the method, a variable radius phase modulation method is combined with an efficient OAM state coordinate conversion separation method, so that each OAM component state of an OAM multiplexing state can randomly adjust a focusing position in a vertical direction of a focal plane, and the adjustment size depends on a setting parameter of a variable radius phase. Therefore, when non-alignment causes that focusing faculae of a receiving end are overlapped, the overlapped faculae can be separated in the vertical direction by using the method, receipt of each OAM state is facilitated, and thus crosstalk between modes of the OAM multiplexing state system is reduced. A result shows that the method providedby the invention can effectively reduce overlapped areas of the faculae, and thus a system error rate can be reduced by 1-2 orders of magnitude.

Description

technical field [0001] The present invention relates to a method for suppressing crosstalk in a non-aligned OAM multiplexing system based on RVP modulation, in particular to a method for suppressing misalignment of transceiver devices in an OAM multiplexing communication system based on radius varying phase (RVP) technology A method for down channel crosstalk belongs to the technical field of optical communication. Background technique [0002] Orbit Angular Momentum (OAM) is a fundamental physical quantity of classical and quantum mechanics, which can be used as a new dimension to increase the rate of information transmission. The value of the OAM state carried by a photon is theoretically infinite, and the OAM states with different values ​​are orthogonal to each other. Therefore, the OAM state can be applied to the multiplexing communication system, effectively improving the capacity of the communication system. In 2004, Gibson et al. proposed a communication scheme bas...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079H04B10/548H04B10/70G02B6/293
CPCG02B6/293G02B6/29346G02B6/2938H04B10/0795H04B10/548H04B10/70
Inventor 赵生妹李成
Owner NANJING UNIV OF POSTS & TELECOMM
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