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High-speed photon analog-to-digital conversion method and system based on pulse processing

An analog-to-digital conversion and pulse processing technology, used in optical analog/digital converters, optics, instruments, etc., can solve the problems of large time jitter, many comparators, and difficult integration, so as to improve the sampling rate and reduce the system complexity. , reduce the effect of time jitter

Active Publication Date: 2022-04-01
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-speed photonic analog-to-digital conversion method and system based on pulse processing for the existing electronic Flash ADC with complex structure, numerous comparators, difficult integration and large time jitter.
The invention solves the technical problems of the existing electronic Flash ADC with complex structure, numerous comparators, difficulty in integration and large time jitter, greatly improves the sampling rate of the photonic analog-to-digital conversion system, and meanwhile the system is simple and easy to implement

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  • High-speed photon analog-to-digital conversion method and system based on pulse processing
  • High-speed photon analog-to-digital conversion method and system based on pulse processing
  • High-speed photon analog-to-digital conversion method and system based on pulse processing

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Embodiment 1

[0038] refer to Figure 1-Figure 3 , the present embodiment provides a high-speed photon analog-to-digital conversion method based on pulse processing, comprising the following steps:

[0039] S1. The mode-locked laser 1 generates an ultrashort optical pulse, and after the ultrashort optical pulse enters the Mach-Zehnder modulator 2 operating in the linear region, the radio frequency signal generated by the signal generator 3 completes linear optical sampling;

[0040] S2, the signal sampled in step S1 is subjected to spectrum shaping in the programmable spectrum shaper 4, and the output spectrum interval is consistent, power weighted and multi-wavelength pulses overlapped in the time domain;

[0041] S3. The multi-wavelength pulse train output in step S2 passes through a section of single-mode dispersion optical fiber 5 and then pulses away, and the pulses of different bands generate different delays in the time domain and spread out uniformly;

[0042] S4. The sampling puls...

Embodiment 2

[0052] refer to figure 2 , the present embodiment provides a high-speed photonic analog-to-digital conversion system based on pulse processing, including: a mode-locked laser 1, a Mach-Zehnder modulator 2, a signal generator 3, a programmable spectral shaper 4, and a single-mode dispersion fiber 5 , photodetector 6 and comparator 7; the specific connection relationship is as follows:

[0053] The output port of the mode-locked laser 1 is connected to the input port of the Mach-Zehnder modulator 2; the signal generator 3 is connected to the radio frequency port of the Mach-Zehnder modulator 2; the output port of the Mach-Zehnder modulator 2 is connected to the programmable The input port of the spectrum shaper 4 is connected; the output port of the programmable spectrum shaper 4 is connected with the input port of the single-mode dispersion fiber 5; the output port of the single-mode dispersion fiber 5 is connected with the input port of the photodetector 6; the photodetector ...

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Abstract

The invention discloses a high-speed photon analog-to-digital conversion method and system based on pulse processing, and the method comprises the following steps: S1, enabling a mode-locked laser to generate an ultra-short optical pulse, and completing the linear optical sampling of a radio frequency signal generated by a signal generator after the ultra-short optical pulse enters a Mach-Zehnder modulator working in a linear region; s2, performing frequency spectrum shaping on the signals sampled in the step S1 in a programmable spectrum shaper, and outputting multi-wavelength pulses which are consistent in frequency spectrum interval, weighted in power and overlapped in time domain; s3, after the multi-wavelength pulse string output in the step S2 passes through a single-mode dispersion optical fiber, pulse walk-off occurs, and pulses of different wavebands generate different delays in a time domain and are uniformly expanded; and S4, the sampling pulse separated in the time domain is converted into an electric signal through a photoelectric detector, and the electric signal is compared with a threshold level set by a comparator to generate a digital quantization signal. According to the invention, time jitter is reduced, and the sampling rate of the photon analog-to-digital conversion system is improved.

Description

technical field [0001] The invention belongs to the technical field of optical communication signal processing, and in particular relates to a high-speed photon analog-to-digital conversion method and system based on pulse processing. Background technique [0002] Analog-to-digital converter (Analog-to-digital Converter, ADC) is an irreplaceable bridge connecting the analog world and the digital world. With the continuous increase of data transmission capacity, the demand for fast conversion between analog and digital signals in the transmitter, receiver and various gateway nodes of the communication system link has increased rapidly. At present, electronic ADC technology is quite mature, especially the wide application of microelectronics technology has greatly improved the processing speed, reliability and integration of electronic solutions. However, in the high frequency range, due to aperture time jitter, decision accuracy and Due to the influence of system noise and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F7/00
Inventor 杨淑娜陈邵池灏曾然李齐良
Owner HANGZHOU DIANZI UNIV