Photon analog-to-digital conversion system and method based on hierarchical quantization principle

Abstract

The invention belongs to the technical field of signal processing of optical communication and particularly relates to a photon analog-to-digital conversion system and method based on a hierarchical quantization principle. The system comprises a mode-locked laser, a first optical beam splitter, a first electro-optical modulator, a second electro-optical modulator, a third electro-optical modulator, a signal generator, a first direct-current power supply, a second direct-current power supply, a third direct-current power supply, a second optical beam splitter, a third optical beam splitter, a fourth optical beam splitter, a coarse quantization module and a fine quantization module. By using the photon analog-to-digital conversion system and method based on the hierarchical quantization principle, compared with a traditional photon analog-to-digital conversion system, a coarse-fine two-stage quantization mode is used to realize exponential secondary growth of quantization stages on thebasis of a same number of MZMs so that bit precision of the analog-to-digital conversion system is greatly improved, and meanwhile, the system has characteristics of a simple structure, easiness in integration and the like.

Description

technical field [0001] The invention belongs to the technical field of optical communication signal processing, and in particular relates to a photon analog-to-digital conversion system and method based on the principle of hierarchical quantization. Background technique [0002] An analog-to-digital converter (ADC) is an indispensable bridge between analog signals and modern high-speed digital signal processing systems. In recent years, as data acquisition, wireless communication, national defense and other fields have higher and higher requirements for signal bandwidth, higher requirements have been put forward for ADC sampling rate, system bandwidth, bit accuracy and other performance. However, the traditional electronic ADC is limited by time jitter and other hardware technologies, and its development is difficult to meet the requirements of modern high-speed digital signal processing systems. With the development of photonic technology, the use of optical devices and te...

AI Technical Summary

Problems solved by technology

However, limited by the bandwidth of the logic circuit and the complexity of the system, this solution is difficult to implement and will seriously affect the performance of the system

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