Ultra-wideband white noise source based on parallel connection of multiple single-mode chaotic lasers

Abstract

The invention discloses an ultra-wideband white noise source based on parallel connection of multiple single-mode chaotic lasers. By adopting the photoelectric conversion technology, the bottleneck ofthe electronic bandwidth is broken through, and the white noise source which is simple in implementation scheme structure and easily generates white noise with larger bandwidth is achieved. In the scheme of the invention, the power for outputting the white noise depends on the responsivity of a photoelectric detector and the power of each chaotic laser, and compared with the existing electronic noise source, the output power is easy to adjust and the exportable maximum power is higher. In addition, according to the technical scheme of the invention, a plurality of single-mode chaotic lasers are connected in parallel to generate ultra-wideband white noise, and the spectral density of the generated noise is more uniform.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an ultra-broadband white noise source based on the parallel connection of multiple single-mode chaotic lasers. Background technique [0002] Man-made controllable noise sources play a very important role in communication, remote sensing, military, astronomy and other fields. [0003] At present, the realization of noise sources mainly includes digital synthesis technology and physical device noise amplification technology. Digital synthesis technology uses DSP or FPGA to first generate a pseudo-random number sequence through algorithms such as linear congruence method and register shift method, and then converts the pseudo-random number sequence into Gaussian white noise through time-frequency mapping. Although this method is easy to implement, it is limited by the clock frequency of the device, and the noise frequency generated by the mathematical synthesis method is ofte...

AI Technical Summary

Problems solved by technology

Although this technology can generate noise with a large bandwidth, the use of physical device noise amplification technology requires complex experimental instruments, which is difficult to implement; at the same time, this technology will inevitably cause spectral distortion in the process of amplifying the original noise, resulting in uneven spectral density.

[0004] Moreover, with the development of science and technology, the operating frequency of existing noise sources can no longer meet the operating frequency of some devices under test.

Most of the existing noise sources are based on electronic technology. Due to the bandwidth bottleneck of electronic devices, it will be very difficult to generate noise with a larger bandwidth. Further increase in bandwidth will also lead to uneven spectral density and low output power of white noise. And other issues

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