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Device and method of correcting wavefront distortion in optical retro-modulation

A technology of reverse modulation and wavefront distortion, which is applied in the field of devices for correcting wavefront distortion in optical reverse modulation and correcting wavefront distortion in optical reverse modulation, which can solve problems such as wavefront distortion, achieve signal distortion and improve effectiveness and accuracy, the effect of simple structure

Active Publication Date: 2018-01-16
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a device for correcting wavefront distortion in optical reverse modulation to solve the problem of wavefront distortion caused by atmospheric effects in reverse modulation laser communication

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  • Device and method of correcting wavefront distortion in optical retro-modulation

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The device for correcting wavefront distortion in optical reverse modulation of the present invention, such as figure 1 As shown, it includes an active end 12 and a passive end 13 connected by an optical path;

[0028] The active end 12 includes a Nd:YAG laser 1 and a polarizer 2 arranged at the output end of the Nd:YAG laser 1, and the Nd:YAG laser 1 and the polarizer 2 are connected through an optical path; Photodetector 8, photodetector 8 is connected with FPGA demodulation board 9, computer A 10 successively by electrical connection line;

[0029] The passive end 13 includes a convex lens 3, and the left and right sides of the convex lens 3 are respectively provided with an electro-optic modulator EOM 5 and a stimulated Brillouin scattering cell 4, and the stimulated Brillouin scattering cell 4, the convex lens 3, and the electro-...

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Abstract

The invention discloses a device of correcting wavefront distortion in optical retro-modulation. The device of correcting wavefront distortion in optical retro-modulation includes an active terminal and a passive terminal which are connected through an optical path. The invention also discloses a method of utilizing the above device to correct wavefront distortion in optical retro-modulation. Themethod of utilizing the above device to correct wavefront distortion in optical retro-modulation includes the steps: a convex lens at the passive terminal receives a wavefront distortion light beam, and focuses the light beam to a stimulated Brillouin scattering pool, and then a retro conjugate beam of the distortion light beam is generated after the light beam and the liquid medium in the stimulated Brillouin scattering pool interact with each other, and then a modulation signal is loaded to the light intensity of the retro conjugate beam, and during the process that the retro conjugate beamreturns along the original optical path, the phase conjugate distortion can offset with wavefront distortion to enable the wavefront phase to be restored to the initial state so as to realize compensation of wavefront distortion in optical retro-modulation. The device and method of correcting wavefront distortion in optical retro-modulation can solve the problem that wavefront distortion is generated in retro-modulation laser communication because of the influence of atmospheric effect.

Description

technical field [0001] The invention belongs to the technical field of wireless laser communication, and relates to a device for correcting wavefront distortion in optical reverse modulation, and also relates to a method for correcting wavefront distortion in optical reverse modulation by using the device. Background technique [0002] Reverse modulation laser communication is a new type of free space optical communication technology. Compared with the traditional wireless laser communication system, the reverse modulation laser communication system has the advantages of strong directivity, fast response, simple structure, and no need for precise positioning of the transmitting end. The field angle is large and so on, so it is widely used. [0003] However, in the reverse modulation laser communication system, due to the influence of various atmospheric effects (turbulence, thermal halo, scattering), the laser energy is lost, the transmission direction is distorted, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/11H04B10/50
Inventor 柯熙政吴加丽陈明莎
Owner XIAN UNIV OF TECH
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