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Reverse light modulation and demodulation method based on reverse light modulation and demodulation system

A technology of optical modulation, demodulation and demodulation, which is applied in the field of laser communication to achieve the effects of low communication bit error rate, large reverse reflection angle and low alignment requirements

Active Publication Date: 2022-07-12
ARMY ENG UNIV OF PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no relevant report on this kind of reverse light modulation

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  • Reverse light modulation and demodulation method based on reverse light modulation and demodulation system
  • Reverse light modulation and demodulation method based on reverse light modulation and demodulation system
  • Reverse light modulation and demodulation method based on reverse light modulation and demodulation system

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Embodiment Construction

[0059] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0060] The optical communication method involved in the present invention uses laser light as an information carrier, and the laser light used should have good coherence and stable output of circular polarization state.

[0061] The specific embodiment of the present invention is a reverse optical modulation and demodulation method based on a reverse optical modulation and demodulation system;

[0062] The schematic diagram of the sy...

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Abstract

The invention discloses a reverse light modulation and demodulation method based on a reverse light modulation and demodulation system. The reverse light modulation and demodulation system comprises a laser, a modulation photoelectric detector, a modulation central processing unit, a first phase modulation unit, a second phase modulation unit, a first directional reflector, a second directional reflector, a demodulation central processing unit, a first demodulation photoelectric detector, a second demodulation photoelectric detector, a first linear polarizer and a second linear polarizer, according to the reverse light modulation and demodulation method, the phase difference of two beams of reflected light is adjusted on a first phase modulation unit and a second phase modulation unit, so that the two beams of reflected light form a coherent pattern in a far field, a first linear polaroid and a second linear polaroid screen out coherent light intensity with mutually orthogonal polarization directions, and according to the coherent characteristic relation, the phase difference of the two beams of reflected light is adjusted. And demodulating phase difference information of reflected light of the first directional reflector and the second directional reflector. The system is stable in performance, resistant to atmospheric interference and low in alignment requirement, and the demodulation method is simple and efficient.

Description

technical field [0001] The invention belongs to the technical field of laser communication, and in particular relates to a reverse optical modulation and demodulation method based on a reverse optical modulation and demodulation system. Background technique [0002] Free-space laser communication has many advantages, but the small divergence angle and complex operation of laser make it face great challenges in the establishment and maintenance of communication links. The retro-optical modulator with directional reflection capability within a certain angle can eliminate the emission light source and tracking system of a terminal, and the complexity, volume weight and energy consumption of the optical retro-modulator are far smaller than those of the laser transmitting and receiving system, especially Suitable for optical communication applications of small unmanned platforms. It is foreseeable that the application of inverse modulation technology will significantly reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/54H04B10/61
CPCH04B10/503H04B10/50577H04B10/54H04B10/61Y02D30/70
Inventor 魏靖松谭朝勇刘云朱孟真
Owner ARMY ENG UNIV OF PLA
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