High-speed analog-to-digital conversion system and method based on mode-locked laser

Abstract

The invention discloses a high-speed analog-to-digital conversion system and method based on a mode-locked laser. The system comprises an electro-optical modulator capable of inputting a radio frequency signal, the electro-optical modulator is respectively connected with a wavelength division multiplexer and a wavelength divider; wherein the wavelength division multiplexer is respectively connected with at least two mode-locked lasers, the wavelength divider is connected with photoelectric detectors, the number of the photoelectric detectors is the same as that of the mode-locked lasers, the photoelectric detectors are connected with electric analog-to-digital converters, and all the electric analog-to-digital converters are connected with a data processing module. The system and method have the beneficial effects that high-speed asynchronous light sampling is adopted, the frequency of a sampled radio frequency signal is improved, analog-to-digital conversion of radio frequency signalswith the frequency of dozens of GHz or even hundreds of GHz can be theoretically realized, the modularization is clear, the performance is more excellent, and the traditional pure electronic analog-to-digital converter can be replaced.

Description

technical field [0001] The present invention relates to the technical field of high-speed analog-to-digital conversion systems, in particular to a high-speed analog-to-digital conversion system and method based on a mode-locked laser. Background technique [0002] Analog-to-digital conversion technology is the most commonly used technology in signal processing, which converts radio frequency analog signals into digital signals. The traditional analog-to-digital conversion system is a purely electronic analog-to-digital conversion system. The disadvantage of electronic analog-to-digital converters is that due to the timing jitter and noise of electrical signals, it is very difficult to implement an electrical-based high-speed analog-to-digital conversion system. In recent years, with the rapid development of photonic technology and the promotion of laser technology and optical devices, people have tried to use optical means to break through the bottleneck of electronic analo...

AI Technical Summary

Problems solved by technology

[0004] The current analog-to-digital conversion scheme based on optical combs uses simple optical sampling. The main problem is that there is only one mode-locked laser, so that only one optical comb can be generated, which makes it difficult to obtain multi-wavelength sampling pulse sequences, and The dispersion approach introduces optical pulse intensity fluctuations and additional pulse-to-pulse timing jitter

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