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Distortion correction method and device based on Brillouin photoacoustic coupling

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

Active Publication Date: 2021-12-24
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 vortex distortion introduced under the condition of strong fluctuations in the medium, and is not suitable for integrated optical circuits

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  • Distortion correction method and device based on Brillouin photoacoustic coupling
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  • Distortion correction method and device based on Brillouin photoacoustic coupling

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Embodiment Construction

[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 distortion correction method and device based on Brillouin photoacoustic coupling. The distortion correction method includes: making the OAM channel beam and the Gaussian type probe beam transmit on the same optical path, and passing through the distortion unit to obtain the distorted OAM channel beam and the distorted probe beam; making the distorted OAM channel beam and the Gaussian type reference beam from two side input, so that the BOPA interaction between the two occurs in the nonlinear medium, and the distortion information carried by the OAM channel beam is written into the phonon field of the nonlinear medium; the distorted detection beam is on the side of the Gaussian reference beam, relative to The Gaussian reference beam is obliquely incident into the nonlinear medium, and through the BAPA interaction with the phonon field carrying the distortion information, the OAM channel beam that removes the distortion information is obtained, and the beam is output in the direction opposite to the propagation direction of the Gaussian reference beam . The distortion correction method and device of the present invention can be used for correction of conventional fluctuating distortion and vortex distortion in media such as air and optical fiber.

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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Patent Type & Authority Patents(China)
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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