A Wideband Chaos Generation Device Without Time Delay

Abstract

The invention belongs to a high-speed chaotic communication carrier, in particular to a broadband chaotic generating device with no delay feature, which solves the problems in the background technology. In the device, the semiconductor laser is connected to the input end of the polarization controller, the output end of the polarization controller is connected to the input end of the 1x2 fiber coupler, and the first output end of the 1x2 fiber coupler is connected to the optical circulator through an erbium-doped fiber amplifier The red port of the 1x2 fiber coupler is connected to the optical reflection device through the attenuator. The splitting ratio between the first output port and the second output port of the 1x2 fiber coupler is greater than or equal to one. Chirped fiber grating, the white port of the optical circulator as the output terminal of the chaotic signal. The invention is simple in structure and easy to operate, can generate a chaotic signal with flat frequency spectrum and large bandwidth and no time delay feature, and can simultaneously realize the functions of improving low-frequency energy components, broadening frequency spectrum, eliminating time delay feature and relaxation oscillation feature.

Description

technical field [0001] The invention relates to a high-speed chaotic communication carrier, in particular to a broadband chaotic generating device with no delay feature. Background technique [0002] Due to its wide spectrum, noise-like, randomness and other characteristics, chaotic signals are widely used in chaotic secure communication, random number generation, chaotic radar and so on. In the chaotic signal generated by the traditional semiconductor laser system based on external cavity feedback, the intrinsic parameter relaxation oscillation frequency of the laser usually controls the oscillation of the chaotic signal. Therefore, in the spectrum of chaotic signals, most of the energy will be concentrated near the relaxation oscillation frequency, the low-frequency energy cannot be effectively utilized, and the bandwidth is usually only a few GHz, which severely limits the signal transmission capability of secure communication systems based on optical chaos. The rate of ...

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Problems solved by technology

[0004] The present invention aims to solve the problem of increasing the bandwidth of the chaotic spectrum and eliminating the time delay feature in the background technology. The device structure is complex and the cost is high; in the solution with a simple structure, the problems of improving low-frequency energy, broadening the spectrum, and eliminating the time delay feature cannot be realized at the same time. technical problem

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