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Chaotic optical network physical layer protection method and system, networking method and network

A protection system and physical layer technology, applied in the transmission system, digital transmission system, modulated carrier system, etc., to achieve the effects of easy polarization disturbance, long-distance optical fiber transmission of high-speed coherent optical signals, and reduced interception probability

Active Publication Date: 2018-12-07
WUHAN POST & TELECOMM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using multiple encryption methods such as software encryption on the time-domain feedback chaotic system can improve its security, but it cannot fundamentally solve the problem

Method used

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  • Chaotic optical network physical layer protection method and system, networking method and network
  • Chaotic optical network physical layer protection method and system, networking method and network
  • Chaotic optical network physical layer protection method and system, networking method and network

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Embodiment 1

[0035] Embodiment 1 of the present invention provides a multi-dimensional physical layer protection method for a chaotic optical network, comprising the following steps:

[0036] After optical chaotic phase modulation is performed at the sending end, digital chaotic encryption is performed to control the speed of polarization change and the amount of each change, and realize two-level hardware encryption at the physical layer of the chaotic optical network;

[0037] The receiving end performs digital chaos decryption first, and then performs optical chaos phase demodulation, and realizes two-level hardware decryption at the physical layer of the chaotic optical network.

[0038] The chaotic system has two kinds of modulation modes, intensity and phase. The power of the phase chaos system is constant, and the tolerance to nonlinearity and dispersion is stronger. Therefore, a better signal-to-noise ratio can be obtained by increasing the input fiber power, so as to obtain better...

Embodiment 2

[0041] see figure 1As shown, Embodiment 2 of the present invention provides a photoelectric feedback type multi-dimensional physical layer protection system, which is used to realize the multi-dimensional physical layer protection method in Embodiment 1. The system includes a sending end and a receiving end, and the sending end includes at least one optical chaos A phase modulation ring and a polarization controller with a polarization adding circuit, the polarization adding circuit controls the speed of the polarization change of the polarization controller and the amount of each change, and the receiving end includes a polarization controller with a depolarization circuit and at least one optical chaotic phase demodulation ring.

[0042] figure 1 It is a photoelectric feedback phase modulation chaotic optical communication structure after adding a polarization controller. figure 2 , 3 It is a schematic diagram of the perturbation curve and depolarization curve of the pol...

Embodiment 3

[0052] As an optional implementation, on the basis of Example 2, see figure 1 As shown, the transmitting end includes a laser connected in sequence, a first phase modulator for inputting information, an optical chaotic phase modulation ring, a first polarization controller with a polarization circuit, and an EDFA (Erbium-Doped Optical Fiber Amplifier, erbium-doped fiber amplifier), plus a polarization circuit to control the speed of polarization change and the amount of each change of the first polarization controller.

[0053] As a preferred embodiment, the optical chaotic phase modulation loop includes a second phase modulator, a first optical coupler, a first delay line, and a DPSK (Differential Phase Shift Keying, differential phase shift keying) connected in sequence to form a closed loop The modulator, the first photodetector, the first electrical amplifier, the first optical coupler is connected with the first polarization controller with the polarization adding circuit...

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Abstract

The invention discloses a chaotic optical network physical layer protection method and system, a networking method and a network, related to the physical layer protection field of a chaotic optical network. The multi-dimensional physical layer protection method comprises the following steps: a transmitting end performs digital chaotic encryption after performing optical chaotic phase modulation, so as to control the speed of polarization change and the change amount of each time, and realize two-level hardware encryption in the physical layer of the chaotic optical network; and a receiving endfirst performs digital chaos decryption, and then performs optical chaotic phase demodulation, so as to realize two-level hardware decryption in the physical layer of the chaotic optical network. Theinvention encrypts in three dimensions of time, frequency and polarization; the chaotic signal and polarization disturbance obviously enhance the secrecy; and the speed of polarization change and thechange amount of each time are controlled; so that the intercept probability is significantly reduced.

Description

technical field [0001] The invention relates to the field of physical layer protection of chaotic optical networks, in particular to a physical layer protection method, system, networking method and network of chaotic optical networks. Background technique [0002] The technical points of the chaotic optical communication system have three parts: chaotic light generation, chaotic light modulation, and chaotic light reception. There are four main structures for generating chaotic light: direct current modulation, external light injection, external light feedback, and photoelectric feedback. The chaotic light modulation methods include: chaotic modulation (CM), chaotic masking (CMS) and chaotic keying (CSK). The performance of chaotic modulation is better than that of chaotic keying, and the performance of chaotic keying is better than that of chaotic masking. Confidential and efficient chaotic optical communication systems are often limited by device parameters, structures,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L27/00H04K1/02H04J14/02
CPCH04J14/02H04K1/025H04L9/001H04L27/001
Inventor 周鹏李响肖希李汉兵高永东张继军余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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