Brillouin photoacoustic coupling-based distortion correction method and device

A technology of distortion correction and Brillouin frequency shift, applied in the field of distortion correction, can solve the problems of dependence on compensation effect, inability to effectively deal with vortex distortion, etc., and achieve the effect of simple operation and strong practicability

Active Publication Date: 2019-05-10
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

Since the compensation effect of this method depends on the accuracy of wavefront detection, it cannot effectively deal with the vort

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  • Brillouin photoacoustic coupling-based distortion correction method and device
  • Brillouin photoacoustic coupling-based distortion correction method and device
  • Brillouin photoacoustic coupling-based distortion correction method and device

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[0024] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0025]Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the s...

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Abstract

The invention provides a Brillouin photoacoustic coupling-based distortion correction method and device. The distortion correction method comprises the following steps: an OAM channel light beam and aGaussian type detection light beam are transmitted by sharing a light path, and a distorted OAM channel light beam and a distorted detection light beam are obtained through a distortion unit; the distorted OAM channel light beam and a Gaussian type reference light beam are input from the two sides of a nonlinear medium and are subjected to BOPA interaction in the nonlinear medium, and distortioninformation carried by the OAM channel light beam is written into a phonon field of the nonlinear medium; and the distorted detection light beam is located on one side of the Gaussian type reference light beam and obliquely comes into the nonlinear medium relative to the Gaussian type reference light beam, the distorted detection light beam and the phonon field carrying the distortion informationare subjected to BAPA interaction to obtain the OAM channel light beam free of the distortion information, and the OAM channel light beam free of the distortion information is output in a direction opposite to a propagation direction of the Gaussian type reference light beam. The distortion correction method and device can be used for correcting conventional fluctuation distortion and vortex distortion in mediums such as atmosphere, optical fibers and the like.

Description

technical field [0001] The invention relates to the technical field of distortion correction, in particular to a distortion correction method and device based on Brillouin photoacoustic coupling. Background technique [0002] In recent years, with the rapid development of fixed and mobile Internet, the data throughput is increasing day by day, and the relatively lagging communication and Internet bandwidth has become the main bottleneck in the era of big data and cloud. Therefore, there is an urgent need for a technology that can simultaneously improve data capacity density and spectrum utilization. In this context, the mode-division multiplexing technology in which all channels share the same frequency spectrum and space resources has gradually developed. Among them, the orbital angular momentum (OAM) multiplexing technology has recently become a research hotspot in this field due to its infinite dimensional characteristics on the physical layer. , It is expected to become...

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Application Information

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IPC IPC(8): G02F1/35
Inventor 高玮李尧胡晓博赵波
Owner HARBIN UNIV OF SCI & TECH
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