Photonic analog-to-digital conversion method and system with improved bit precision

A technology of analog-to-digital conversion and bit precision, which is applied in the field of photonic analog-to-digital conversion methods and systems, can solve the problems of low bit precision, achieve the effects of improving bit precision, increasing the number of quantization channels, and easy integration

Active Publication Date: 2021-07-27
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low bit precision in the traditional phase-shift optical quantization scheme, and provide a photonic analog-to-digital conversion system with simple structure, easy integration and improved bit precision

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  • Photonic analog-to-digital conversion method and system with improved bit precision
  • Photonic analog-to-digital conversion method and system with improved bit precision
  • Photonic analog-to-digital conversion method and system with improved bit precision

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Such as figure 1 As shown, a photonic analog-to-digital conversion system with improved bit accuracy proposed by the present invention includes a femtosecond pulse laser 1, an optical fiber beam splitter 2, a first electro-optic modulator 5, a second electro-optic modulator 6, and a signal generator 7 , DC power supply 8, first photodetector 9, second photodetector 10, radio frequency operation circuit module 11 and comparator array 12; Described femtosecond pulsed laser 1 is connected with fiber optic beam splitter 2; Fiber optic beam splitter The output end 3 of 2, the first electro-optic modulator 5, and the first photodetector 9 are connected in sequence; the output end 4 of the fiber beam splitter 2, the second electro-optic modulator 6, and the ...

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Abstract

The invention discloses a photon analog-to-digital conversion method and system with improved bit precision. A femtosecond pulse laser is used to provide a pulse light source, which is divided into two parallel sampling pulse sources by an optical fiber beam splitter, and the analog radio frequency signal is sampled by an electro-optical modulator. , the photoelectric conversion is carried out by the photodetector into an electrical signal, and after the operation and processing by the radio frequency operation circuit module, the threshold value judgment is performed by the comparator array, and the four digital signals obtained after the judgment is completed are the digitized signals of the analog signal. Compared with the traditional photonic analog-to-digital conversion system, the photonic analog-to-digital conversion system does not need to use a large number of comparator arrays for multi-threshold judgment, and only uses the radio frequency operation circuit module to perform addition and subtraction operations on radio frequency signals to equivalently increase the quantization channel. Number, so that the bit accuracy of the analog-to-digital conversion system can be effectively improved, and the system has the characteristics of simple structure and easy integration.

Description

technical field [0001] The invention relates to the signal processing field of optical communication, in particular to a photon analog-to-digital conversion method and system with improved bit precision. Background technique [0002] An analog-to-digital converter (ADC) is the bridge between the real analog world and the digital world. The analog-to-digital converter with high sampling rate and high bit precision is one of the indispensable core devices between modern analog sensors and digital signal processing systems, and plays an important role in broadband radar, electronic reconnaissance, software radio, real-time measurement and other fields important role. However, due to the inherent timing jitter and bandwidth bottlenecks, the performance of traditional electronic ADCs is difficult to meet the needs of modern applications, and it is urgent to find a new technology to improve the performance of analog-to-digital converters. [0003] Photonic ADCs have the advantag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F7/00
CPCG02F7/00
Inventor 池灏杨淑娜李齐良毕美华
Owner HANGZHOU DIANZI UNIV
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