A Method for Analyzing Chaotic Dynamics of Electro-optic Phase Similar to Frequency Dependent Time Delay

An analysis method and related time delay technology, applied in the field of optical information
CN108768609BInactive Publication Date: 2020-12-08HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU DIANZI UNIV
Publication Date
2020-12-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an analysis method of similar frequency-dependent delay electro-optic phase chaotic dynamics. The method is executed according to the following steps: step 1, building a dynamic mathematical model in a chaotic communication system; step 2, determining a relation between delay and frequency; step 3, dividing time interval and determining an equation initial value; step 4, solving a delay signal of each moment in one period of time after delay through Fourier time-frequency transformation; step 5, converting a delay differential equation into an ordinary differential equation; step 6, performing numerical solution for the ordinary differential equation of the step 5 through a Runge-Kutta method. The method provided by the invention can accurately solve a differential-integral equation having frequency-dependent delay, and can accurately analyze chaotic dynamics and chaotic communication having frequency-dependent delay feedback.
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Description

technical field

[0001] The invention belongs to the technical field of optical information, and in particular relates to an analysis method of electro-optic phase chaos dynamics similar to frequency-dependent time delay. Background technique

[0002] In current chaotic optical communication systems, semiconductor lasers are often coupled to each other to increase their degrees of freedom to generate chaotic signals. Its biggest feature is to use the chaotic signal as the carrier of the signal. Since the chaos has the characteristics of synchronization and robustness, it can realize the decoding of the transmitted information. When transmitting a signal, the chaotic carrier output from the transmitter acts as a carrier for transmitting the signal. Since the amplitude of the signal is much smaller than the fluctuation of the chaotic carrier, it is difficult to separate the signal from the chaotic carrier. Specifically, in order to decode the signal, the transmitted informati...

Claims

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