Optical fiber coupling device and method of Gaussian-Shell model vortex beam

An optical fiber coupling device and vortex beam technology, which are applied in the field of optical fiber coupling, can solve problems such as difficult optical fiber coupling, and achieve the effect of solving difficult optical fiber coupling

Pending Publication Date: 2022-04-19
SHANDONG NORMAL UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0005] However, the wide application of Gauss-Scherer model vortex beams in free space optical communication has encountered many obstacles, among which there are certain difficulties in the fiber coupling of Gauss-Scherer model vortex beams

Method used

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  • Optical fiber coupling device and method of Gaussian-Shell model vortex beam

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Embodiment 1

[0046] See attached figure 1 As shown, this embodiment discloses a fiber coupling device for a Gauss-Scherer model vortex beam, including: a Gauss-Scherer model vortex beam generating device, a second spatial light modulator 8 and a third thin lens 9 .

[0047] The Gauss-Scherer model vortex beam generating device is used to generate a Gauss-Scherer model vortex beam, and transmit the Gauss-Scherer model vortex beam to the second spatial light modulator 8 .

[0048] The second spatial light modulator 8 is used to load the anti-helical phase of the transmitted Gauss-Scher model vortex beam based on the phase information of the Gauss-Scher model vortex beam (ie, vortex phase information), and perform phase resolution. tune to get the demodulated beam. Specifically, the second spatial light modulator 8 is configured with a Damman grating carrying an anti-helical phase, and the transmitted Gauss-Scherer model vortex beam passes through the Damman grating carrying an anti-helical ...

Embodiment 2

[0055] The purpose of this embodiment is to provide a fiber coupling method for Gauss-Scher model vortex beams, including:

[0056] Transmitting the Gauss-Scher model vortex beam generated by the Gauss-Scher model vortex beam generating device;

[0057] Load the anti-helical phase on the transmitted Gauss-Scher model vortex beam, and perform phase demodulation to obtain the demodulated beam;

[0058] Focus the demodulated beam onto the fiber.

[0059] Among them, the specific method of loading the anti-helical phase is: the transmitted Gauss-Scher model vortex beam passes through the Damman grating carrying the anti-helical phase to obtain the demodulated beam.

[0060] Among them, the generation method of the Gauss-Scher model vortex beam is:

[0061] Converting a perfectly coherent signal beam to a completely incoherent light;

[0062] Perform Fourier transform on the completely incoherent light to obtain the transformed completely incoherent light; the specific method is...

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Abstract

The invention discloses an optical fiber coupling device and method for a Gaussian-Schell model vortex beam. The optical fiber coupling device comprises a Gaussian-Schell model vortex beam generation device, a second spatial light modulator and a third thin lens, the Gaussian-Schell model vortex beam generation device is used for generating a Gaussian-Schell model vortex beam and transmitting the Gaussian-Schell model vortex beam to the second spatial light modulator; the second spatial light modulator is used for loading an anti-spiral phase to the transmitted Gaussian-Schell model vortex light beam and carrying out phase demodulation to obtain a demodulated light beam; and the third thin lens is used for focusing the demodulated light beam to the optical fiber. The Gaussian-Schell model vortex light beam can be simply, conveniently and accurately coupled into the optical fiber.

Description

technical field [0001] The invention belongs to the technical field of optical fiber coupling, and in particular relates to an optical fiber coupling device and method for a Gauss-Scher model vortex beam. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Improving spectrum utilization, improving channel transmission capacity and communication capacity density is the main goal of current communication and an urgent problem to be solved. Laser optical communication can realize a new communication spectrum and expand to the (high) frequency band to reduce the spectrum gap. Multiple-Input Multiple-Output (MIMO) is currently an effective technical means to improve spectrum utilization and transmission capacity. [0004] However, when the signal-carrying laser in free-space optical communication is transmitted in the atmosphere, it is disturbed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26
CPCG02B6/262
Inventor 张慧王金鑫袁扬胜蔡阳健
Owner SHANDONG NORMAL UNIV
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