A microwave signal analog-to-digital conversion method and device based on photoelectric space-time conversion
A space-time conversion and microwave signal technology, applied in the field of optoelectronics, can solve the problems of bandwidth and sampling rate of typical photonic analog-to-digital converters and low effective number of bits, so as to reduce the difficulty and the pressure of the back-end processing system and reduce the difficulty , to achieve the effect of equivalent conversion
Active Publication Date: 2020-04-03
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0007] The purpose of the present invention is to provide a microwave signal analog-to-digital conversion method and device based on photoelectric space-time conversion, which solves the limitation of bandwidth and sampling rate of traditional electronic analog-to-digital converters due to the "electronic bottleneck" and the practicality of typical photonic analog-to-digital converters and the problem of low significant digits
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[0053] The invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0054] The invention firstly converts the electrical signal to be tested into an optical signal, then doubles the frequency of the converted optical signal into a frequency-doubled optical signal; then converts the frequency-doubled optical signal into an optoelectronic signal carrying the same intensity and phase information signal, and accelerate, focus, and scan the optoelectronic signal into an electronic signal with different spatial information and intensity information, and then convert the electronic signal with different spatial information and intensity information into an optical signal; finally collect and process the optical signal . On the basis of bandwidth compression of the optical signal carrying information, replace the optical signal with an optoelectronic signal that is easier to manipulate, and convert the complex and difficult-to...
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The invention belongs to the technical field of photoelectronics, and particularly relates to a photoelectric time-to-space conversion-based microwave signal analog-to-digital conversion method and device. In the system, a photoelectronic signal more easy to control is used for substituting an optical signal on the basis that a traditional time stretching system is used for performing bandwidth compression on the optical signal carrying information, stretching of the optical signal on complicated time difficult to accurate control is equivalently converted to stretching of photoelectronics carrying same information on space, equivalent conversion from a high-speed time signal to a low-speed space signal is achieved, the signal control difficulty and pressure of a back-end processing systemare greatly reduced, the device has the capability of sampling a wideband signal in real time, relatively high accuracy can be maintained, three-dimensional information in time, intensity and space can be simultaneously obtained, and the problems of limitation on bandwidth and sampling rate of an electronic bottleneck of a traditional electronic analog-to-digital converter and low practicabilityand significant digit of a typical photon analog-to-digital converter are solved.
Description
technical field [0001] The invention belongs to the technical field of optoelectronics, and in particular relates to a microwave signal analog-to-digital conversion method and device based on photoelectric space-time conversion. Background technique [0002] High-performance analog-to-digital conversion is the link between analog and digital signals. Whether it is real-time monitoring of high-energy physical transient processes, or applications such as radar systems, satellite communications, biomedical imaging systems, and software radios, there is an urgent need for high-sampling rate, high-precision analog-to-digital converters. Although the analog-to-digital conversion technology has made great progress in recent years, it is difficult for the traditional electronic analog-to-digital converter to simultaneously realize broadband, A breakthrough in high sampling rate and high precision. [0003] In order to meet the ever-increasing sampling rate and precision requiremen...
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IPC IPC(8): G02F7/00
CPCG02F7/00
Inventor 罗端田进寿惠丹丹刘兴钊王开志高叶盛陈立武温文龙王兴陈萍李立立
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI