An ultra-high-speed optical analog-to-digital conversion device

Abstract

The invention relates to an ultra high-speed optical analog-to-digital conversion device. The ultra high-speed optical analog-to-digital conversion device comprises a high-speed pulse laser, a frequency spectrum broadening module, a repetition frequency multiplication module, an ultra wide band signal sampling module, a wavelength multi-channelizing module, parallel photoelectric conversion modules, parallel electric quantization modules and parallel data processing modules, wherein the high-speed pulse laser, the frequency spectrum broadening module, the repetition frequency multiplication module, the ultra wide band signal sampling module, the wavelength multi-channelizing module, the parallel photoelectric conversion modules, the parallel electric quantization modules and the parallel data tprocessing modules are sequentially connected. According to the ultra high-speed optical analog-to-digital conversion device, the high-speed pulse laser and the wavelength-division multiplexing technology are combined, while the advantages that the wavelength-division multiplexing technology is simple and practicable are kept, the defect that the output frequency spectrum of an active mode-locking fiber laser is narrow is overcome through the frequency spectrum broadening technology, high-speed photoelectric sampling is carried out through a broadband 1*2 electro-optical modulator, and by increasing the number of wavelength-division multiplexing channels or the number of parallel channels of the system, the bandwidth of a photoelectric detector and the sampling rate of an electric analog-to-digital converter are not increased while the sampling rate of the system is improved.

Description

technical field [0001] The invention relates to the technical field of optical information processing, in particular to an ultra-high-speed optical analog-to-digital conversion device. Background technique [0002] Signals in nature exist in continuous form, that is, analog signals. In order to facilitate signal transmission, processing and storage, analog signals need to be converted into digital signals. Therefore, the analog-to-digital converter is a bridge connecting the analog world and the digital world. In recent years, electrical analog-to-digital conversion (EADC) technology has developed rapidly. The highest sampling rate of commercial chips in the world is about 30Gs / s, 5.5bit, and the analog bandwidth that the corresponding equipment can handle can reach 30GHz. However, these indicators are close to the theoretical limit of electricity, and further improvement faces great challenges. This is because the design, manufacture and packaging of EADC are all based on t...

AI Technical Summary

Problems solved by technology

The sampling rate of PADC based on time division multiplexing is limited by the optical switch speed and the accuracy of optical time synchronization required in the demultiplexing process, so its application is limited

The demultiplexing process based on wavelength division multiplexing technology is very simple, but the number of available channels is limited by the bandwidth of optical devices such as the repetition frequency of the pulsed laser source and the available spectral width, which limits the increase in sampling rate.

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