Broadband sampled photon time stretching analog-digital conversion system

Abstract

The invention discloses a broadband sampled photon time stretching analog-digital conversion system, which comprises a mode-locked laser, a first dispersive medium, a first polarization controller, apolarization modulator and an optical coupler which are connected in order; an output end of the optical coupler is a two-path output which is an upper branch and a lower branch; the upper output branch of the optical coupler is connected with the polarization controller, and the lower output branch of the optical coupler is connected with a third polarization controller; output ends of the secondand third polarization controllers are commonly connected with a polarization beam combiner, and the polarization beam combiner is orderly connected with a second dispersive medium, a photoelectric detector and an electric analog-digital converter. The broadband sampled photon time stretching analog-digital conversion system can eliminate power fading transfer function in a regular photon time stretching analog-digital conversion system, thus the limited sampling broadband in the existing system is solved, and the time broadband product performance of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of analog-to-digital conversion systems, and relates to a wide-band sampling photon time-stretching analog-to-digital conversion system. Background technique [0002] In the fields of electronic countermeasures, broadband communication, radar, etc., it is usually necessary to perform analog-to-digital conversion on various large-bandwidth, high-frequency microwave signals at the receiving end for subsequent digital signal processing. There is an "electronic bottleneck" in traditional electrical analog-to-digital converters, which cannot process high-frequency and large-bandwidth signals with high speed and high precision. [0003] The photonics method has the advantages of large bandwidth, low loss, anti-electromagnetic interference, etc., and has huge signal transmission and processing capabilities. Therefore, the use of photonics technology can perform complex signal processing functions in a very short ti...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a broadband sampling photon time stretching analog-to-digital conversion system, which can eliminate the power fading transfer function in the conventional photon time stretching analog-to-digital conversion system, thereby solving the limitation of sampling bandwidth in the existing system problem, improving the time-bandwidth product performance of the system

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