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A method and system for time-stretching analog-to-digital conversion based on radio frequency signal delay photon

A radio frequency signal and time-stretching technology, applied in optical analog/digital converters, optics, instruments, etc., can solve problems such as signal distortion, achieve improved performance, simple structure, and easy implementation

Active Publication Date: 2022-07-26
深圳立专技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to aim at the defects of the prior art, and provide a method and system for stretching analog-to-digital conversion based on radio frequency signal delay photon time stretching, which solves the problem of traditional photon time stretching based on continuous signals by using the method of adding delay to radio frequency signals. The problem of signal distortion caused by imperfect channel matching in the stretching system greatly improves the performance of the analog-to-digital conversion system based on continuous signal photon time stretching, and at the same time has the advantages of simple structure and easy operation

Method used

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  • A method and system for time-stretching analog-to-digital conversion based on radio frequency signal delay photon
  • A method and system for time-stretching analog-to-digital conversion based on radio frequency signal delay photon
  • A method and system for time-stretching analog-to-digital conversion based on radio frequency signal delay photon

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Embodiment 1

[0031] This embodiment provides a method for time-stretching analog-to-digital conversion based on a radio frequency signal delay photon, including the steps:

[0032] S11. The mode-locked laser generates an optical pulse sequence, and the generated optical pulses are propagated and expanded by the first dispersive fiber and then enter the first Mach-Zehnder modulator and the second Mach-Zehnder modulator respectively through an optical beam splitter;

[0033] S12. The radio frequency signal generator generates a radio frequency signal, and the generated radio frequency signal enters the first Mach-Zehnder modulator one way, and the other way enters the second Mach-Zehnder modulator after passing through the radio frequency delay unit;

[0034] S13. The first Mach-Zehnder modulator outputs a first optical signal, and the outputted first optical signal propagates through the second dispersive fiber and then enters the first WDM; the second Mach-Zehnder modulator The Del modulat...

Embodiment 2

[0061] This embodiment provides a time-stretching analog-to-digital conversion system based on a radio frequency signal delay photon, including a mode-locked laser, a first dispersive fiber, an optical beam splitter, a first Mach-Zehnder modulator, and a second Mach-Zehnder modulator Modulator, RF signal generator, RF delay unit, second dispersive fiber, third dispersive fiber, first WDM, second WDM, first photodetector, second photodetector a third photodetector, a fourth photodetector, a fifth photodetector, a sixth photodetector, a seventh photodetector, an eighth photodetector, an electrical ADC array, and a digital signal processing module;

[0062] The mode-locked laser and the optical beam splitter are connected through a first dispersive optical fiber; the optical beam splitter is respectively connected to the first Mach-Zehnder modulator and the second Mach-Zehnder modulator; the radio frequency signal generator is connected to the first Mach-Zehnder modulator respecti...

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Abstract

The invention discloses a time-stretching analog-to-digital conversion method and system based on radio frequency signal delay photon, and relates to a radio frequency signal delay photon time-stretching analog-to-digital conversion system, comprising: a mode-locked laser and a first dispersive fiber , optical beam splitter, first Mach-Zehnder modulator, second Mach-Zehnder modulator, RF signal generator, RF delay unit, second dispersive fiber, third dispersive fiber, first wave decomposition complex device, second wave demultiplexer, first photodetector, second photodetector, third photodetector, fourth photodetector, fifth photodetector, sixth photodetector, seventh photodetector detector, eighth photodetector, electrical ADC array, digital signal processing module. The invention solves the problem of signal distortion caused by the spectral overlap of adjacent channels of the wave decomposition multiplexer in the continuous-time photonic time-stretching analog-to-digital conversion system, and improves the performance of the continuous-time photonic time-stretching system.

Description

technical field [0001] The invention relates to the technical field of optical communication signal processing, and in particular, to a method and system for time-stretching analog-to-digital conversion based on radio frequency signal delay photon. Background technique [0002] Digital signal processing has many advantages such as flexibility, high speed, high precision and strong anti-interference ability, which is unmatched by analog signal processing technology, and has become the mainstream technology in the field of signal processing. However, most of the signals in nature exist in the form of analog signals. In order to make full use of the advantages of digital signal processing, it is necessary to use an analog-to-digital converter (ADC) to convert analog signals into digital signals, and then process, transmit and store them in the digital domain. Therefore, as an irreplaceable bridge and link between the analog world and the digital world, the performance of ADC di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F7/00
CPCG02F7/00
Inventor 杨淑娜王剑池灏李齐良杨波曾然
Owner 深圳立专技术转移中心有限公司
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