Binary space chaos laser communication system based on first-order transverse mode

A chaotic laser and communication system technology, applied in the direction of secure communication through chaotic signals, optical transmission system, transmission system, etc., can solve the problem of high coupling loss, reduce requirements, improve security and confidentiality, improve efficiency and accuracy Effect

Active Publication Date: 2018-11-13
NANJING UNIVERSTIY SUZHOU HIGH TECH INST +1
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  • Abstract
  • Description
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Problems solved by technology

In addition, the coupling loss of the fundamental transverse mode between the device and the device and between the device and the fiber is relatively high

Method used

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  • Binary space chaos laser communication system based on first-order transverse mode
  • Binary space chaos laser communication system based on first-order transverse mode
  • Binary space chaos laser communication system based on first-order transverse mode

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0025] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein Explanation.

[0026] figure 1 It is a system structure diagram of the present invention. Such as figure 1 As shown, the transmitting module includes: a first laser 11, a second laser 12, a photodetector 16, a coupler 14, an erbium-doped fiber amplifier 15 and a Mach-Zehnder electro-optical modulator 13; whe...

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Abstract

The invention discloses a binary space chaos laser communication system based on a first-order transverse mode and relates to the field of chaos laser communication. The system comprises a transmitting module and a receiving module. The transmitting module is used for coupling signal light composed of two modes of lasers with a carrier, forming an overlapped signal and transmitting the overlappedsignal. The receiving module is used for receiving and demodulating the overlapped signal, detecting power at different locations on the same section of the signal and further identifying a mode. According to encryption mode provided by the invention, a chaos system monitoring mode for laser signal power detection is bypassed, so the confidentiality of a chaos system is improved. A high-order modehas relatively high coupling capability. The coupling loss among devices can be reduced. The transmission precision degree can be improved.

Description

technical field [0001] The invention relates to the field of chaotic laser communication, in particular to a binary space chaotic laser communication system based on a first-order transverse mode. Background technique [0002] Chaos phenomenon is a deterministic and quasi-random process in nonlinear systems, that is, random-like behaviors can occur in deterministic nonlinear systems without adding any random factors. According to the sensitivity of the chaotic sequence to the initial conditions, it can be used for multiple access communication; its noise-like characteristics enable the chaotic signal to hide useful information, which can improve the confidentiality of the communication system; its accurate regeneration characteristics can be used for chaotic concealment and signal recovery. The optical fiber communication system has many advantages such as high speed, large capacity, long relay distance, and anti-electromagnetic interference. Chaotic laser communication co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/85H04L9/00
CPCH04B10/85H04L9/001
Inventor 李密陈媛王苏孙训宋跃江
Owner NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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