Ultra-wide band (UWB) chaotic signal generator

Abstract

The invention discloses an ultra-wide band (UWB) chaotic signal generator. An annular structure system is composed of a drive laser, a response laser, a driven laser and an optical circulator; the output of one of the three lasers is injected into another laser through the optical circulator; the output light of the drive laser enters an Er-doped fiber amplifier through the optical circulator andis amplified, then the polarization state of the light is controlled by a polarization controller, and the light is injected into the response laser through a port of the optical circulator; the output light of the response laser enters the Er-doped fiber amplifier through the optical circulator and is amplified; the amplified light goes through a port of an optical fiber coupler, the polarization state of one part of the light is controlled by the polarization controller, and then the light is injected into the driven laser through the port of the optical circulator; the output light of the driven laser goes through the port of the optical circulator and is processed by an attenuator; the polarization state of the light is controlled by the polarization controller, and the light is injected into the drive laser through the port of the optical circulator; and the process is performed circularly and finally the wide-band chaotic laser is generated and output from one end of an optical coupler.

Description

technical field [0001] The invention relates to a broadband chaotic signal generator, specifically, a device for generating ultra-broadband chaotic laser signals by using a semiconductor laser ring, which is applied in the fields of optical communication, radar detection, laser ranging, security and the like. technical background [0002] Semiconductor lasers can generate chaotic lasers under additional disturbance (optical feedback, optical injection or photoelectric feedback). Chaotic secure communication based on chaotic lasers, chaotic lidar, fast random number generator, correlated chaotic optical time domain reflectometer and optical coherence layer Analysis and many other applications have been proposed one after another. Bandwidth is an important index to measure the quality of chaotic laser, which directly determines the application quality of chaotic laser in different fields. Key technical indicators such as measurement accuracy and random number generation rate....

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of the relaxation oscillation frequency of semiconductor lasers, the bandwidth of traditional chaotic lasers is only on the order of GHz, which will seriously limit the application of chaotic lasers.

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