Method for generating multi-mode high-order vortex light capable of resisting turbulence disturbance by using distortion disturbance

A technology of turbulence disturbance and vortex light, which is applied in the field of optical information regulation, can solve problems affecting the development of free space optical communication, destroying the spatial information structure of the light field, and strong coherence of the light field, achieving low manufacturing cost and simple optical path structure , a large degree of controllable effect

Pending Publication Date: 2022-06-28
CHINA JILIANG UNIV
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  • Description
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Problems solved by technology

[0005] Although there are many methods for generating anti-turbulence beams, these methods are mainly designed for the coherent superposition method. The generated light field has strong coherence and is prone to speckle, thus destroying the spatial information structure of the light field.
Using incoherent superposition to control the light field can avoid the above problems, but the application of efficient and controllable incoherent superposition technology in multimode high-order vortex photocombination is still the current bottleneck problem, which seriously affects the free-space optical field. Developments in the field of communications

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  • Method for generating multi-mode high-order vortex light capable of resisting turbulence disturbance by using distortion disturbance
  • Method for generating multi-mode high-order vortex light capable of resisting turbulence disturbance by using distortion disturbance
  • Method for generating multi-mode high-order vortex light capable of resisting turbulence disturbance by using distortion disturbance

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the examples. The following examples are to explain the present invention, and are also better application forms of the present invention, but the present invention is not limited to the following examples.

[0027] attached figure 1 As shown, it is a schematic structural diagram of a method for generating multi-mode high-order vortex light with anti-turbulence disturbance provided by the present embodiment, which includes a laser 1 , a spatial light modulator 2 , a computer 3 , and a power meter 4 . combined with figure 1 , the working steps of this embodiment are as follows:

[0028] 1. Turn on the laser 1, the laser light enters the spatial light modulator 2, and the computer 3 is used to modulate the spatial light modulator 2:

[0029] (1) A single-mode vortex beam is generated, and its wave function can be expressed as U(x, y, L), where L is the topological charge; x, y are the co...

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Abstract

The invention discloses a method for generating multi-mode high-order vortex light capable of resisting turbulence disturbance by using distortion disturbance. According to the method, a computer is used for modulating laser, distortion disturbance is introduced into single-mode vortex light, a large number of off-axis single-mode vortex light beams with different disturbance centers are constructed, the off-axis single-mode vortex light beams are made to form single-mode high-order vortex light fields with distortion disturbance through incoherent superposition, and finally a plurality of single-mode high-order vortex light fields with distortion disturbance are subjected to incoherent superposition. And forming a multi-mode high-order vortex light field, and carrying out incoherent superposition on a plurality of instantaneous fields on a time axis to obtain multi-mode high-order vortex light with turbulence disturbance resistance. The method is simple in device and easy to modulate, and has application value in the fields of optical communication and the like.

Description

technical field [0001] The invention discloses a method for generating multi-mode high-order vortex light with anti-turbulence disturbance by utilizing twist disturbance, and belongs to the field of optical information regulation. Background technique [0002] Vortex light is a beam with a phase wave front that rotates in an axial vortex. It is characterized in that the light is twisted around its travel axis in a spiral shape. Due to the twist, the light waves on the axis cancel each other out. When it is projected on a plane, It looks like a halo with a black hole in the center, so the vortex light is also called a spiral beam or a photon vortex. Vortex light can use its orbital angular momentum to encode and transmit information, and can also effectively improve the channel capacity of communication, and can be used in optical capture, quantum communication and other fields. Among them, vortex optical communication in free space has great application prospects. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00
CPCG02B27/0012
Inventor 陈君戚国震
Owner CHINA JILIANG UNIV
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