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

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

Active Publication Date: 2020-09-18
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

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

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Embodiment 1

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

[0032] S11. The mode-locked laser generates an optical pulse sequence, and the generated light pulse sequence passes through the optical beam splitter after being propagated and broadened by the first section of dispersive fiber, and enters the first Mach-Zehnder modulator and the second Mach-Zehnder modulator respectively;

[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 output first optical signal enters the first wave division multiplexer after being propagated through a second section of dispersi...

Embodiment 2

[0061] This embodiment provides an analog-to-digital conversion system based on radio frequency signal delay photon time stretching, including a mode-locked laser, a first section of dispersive fiber, an optical beam splitter, a first Mach-Zehnder modulator, and a second Mach-Zehnder Modulator, RF signal generator, RF delay unit, second section of dispersive fiber, third section of dispersive fiber, first wave demultiplexer, second wave demultiplexer, first photodetector, second photodetector device, 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 is connected to the optical beam splitter through the first dispersion 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 generat...

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Abstract

The invention discloses an analog-to-digital conversion method and system based on radio frequency signal delay photon time stretching. The analog-to-digital conversion system based on radio frequencysignal delay photon time stretching comprises a mode-locked laser, a first segment of dispersion optical fiber, an optical beam splitter, a first Mach-Zehnder modulator, a second Mach-Zehnder modulator, a radio frequency signal generator, a radio frequency delay unit, a second segment of dispersion optical fiber, a third segment of dispersion optical fiber, a first wavelength division demultiplexer, a second wavelength division demultiplexer, a first photoelectric detector, a second photoelectric detector, a third photoelectric detector, a fourth photoelectric detector, a fifth photoelectricdetector, a sixth photoelectric detector, a seventh photoelectric detector, an eighth photoelectric detector, an electric ADC array and a digital signal processing module. According to the invention,the problem of signal distortion caused by spectrum overlapping of adjacent channels of a wavelength division demultiplexer in a continuous time photon time stretching analog-to-digital conversion system is solved, and the performance of the continuous time photon time stretching system is improved.

Description

technical field [0001] The invention relates to the technical field of optical communication signal processing, in particular to a method and system for delaying photon time-stretching analog-to-digital conversion based on radio frequency signals. Background technique [0002] Digital signal processing has many advantages such as flexibility, high speed, high precision and strong anti-interference ability, which is incomparable to 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 the analog signal into a digital signal, and then process, transmit and store it in the digital domain. , Therefore, ADC is an irreplaceable bridge and link between the analog world and the digital world, and its perform...

Claims

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Application Information

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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