Photon analog-to-digital conversion method and system based on weighted modulation curve

A technology of analog-to-digital conversion and modulation curve, which is applied in optical analog/digital converters, optics, instruments, etc., to achieve the effect of improving bit accuracy

Active Publication Date: 2021-04-20
深圳立专技术转移中心有限公司
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Problems solved by technology

However, this scheme can only work in the case of small signal modulation, and it is necessary to control the MZM bias at the quadrature point and the modulation depth is small to achieve linear intensity modulation of the input analog signal

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  • Photon analog-to-digital conversion method and system based on weighted modulation curve
  • Photon analog-to-digital conversion method and system based on weighted modulation curve
  • Photon analog-to-digital conversion method and system based on weighted modulation curve

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Embodiment 1

[0031] Such as figure 1 As shown, the present invention proposes a photon analog-to-digital conversion system based on a weighted modulation curve, including a weighted multi-wavelength pulse source 1, an optical beam splitter 2, a first Mach-Zehnder modulator 3, a second Mach-Zehnder Modulator 4, third Mach-Zehnder modulator 5, signal generator 6, first DC power supply 7, second DC power supply 8, third DC power supply 9, first dispersive element 10, second dispersive element 11, The third dispersive element 12, the first photodetector 13, the second photodetector 14, the third photodetector 15, the first comparator 16, the second comparator 17 and the third comparator 18; the weighted multi-wavelength The pulse source 1 is used to send multi-wavelength sampling optical pulses, and the signal generator 6 is used to generate analog radio frequency signals and synchronously input them to the first Mach-Zehnder modulator 3, the second Mach-Zehnder modulator 4 and the third In t...

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Abstract

The invention relates to a photon analog-to-digital conversion method and system based on a weighted modulation curve. The improvement of the quantification precision of the photon analog-to-digital conversion system is realized by combining a phase-shifting light quantification technology with a weighted multi-wavelength sampling pulse and employing a weighted modulation curve; according to the system, a weighted multi-wavelength pulse source is used for generating weighted multi-wavelength sampling optical pulses, and radio frequency analog signals are modulated to the weighted multi-wavelength sampling optical pulses through a Mach-Zehnder modulator; and modulation signals are connected into a dispersion element to achieve time domain walk-off of multi-wavelength pulses, then photoelectric conversion is conducted through the photoelectric detector, threshold comparison is conducted through the comparator, and therefore conversion from analog signals to digital signals is achieved. Compared with a traditional photon analog-to-digital conversion system, the scheme realizes uniform quantification of analog input signals by utilizing the weighted modulation curve, so that the bit precision of the photon analog-to-digital conversion system is improved, and meanwhile, the photon analog-to-digital conversion system is simple in structure and easy to realize.

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 method and system based on a weighted modulation curve. Background technique [0002] Analog-to-digital converter (Analog-to-digital Converter, ADC) acts as a bridge between the analog world and the digital world. ADC plays a vital role in electronic products, precision instruments and aviation communications. In the past ten years, electronic ADCs have made great progress in increasing the sampling rate and resolution. However, with the emergence of applications such as radar systems, real-time monitoring, and medical imaging that require both large bandwidth and high resolution, the performance of traditional electronic ADCs has reached its limit. Due to the inherent limitations of electronics such as radio frequency delay, time jitter, and electromagnetic interference, traditional electronic ADC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F7/00
Inventor 杨淑娜胡晓云池灏杨波李齐良
Owner 深圳立专技术转移中心有限公司
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