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Microwave frequency anti-distortion and anti-dispersion measurement method based on quantum entanglement light source

A quantum entanglement, microwave frequency technology, applied in the direction of eliminating distortion/dispersion, photonic quantum communication, optical fiber transmission, etc., can solve the problem of increasing the spurious-free dynamic range, achieve the improvement of spurious-free dynamic range, and avoid devices such as amplifiers The use of, the effect of good spurious suppression characteristics

Pending Publication Date: 2022-05-13
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

However, due to nonlinear effects of the modulator, such as electrical distortion caused by harmonics and intermodulation, the increase in spurious-free dynamic range will be limited.

Method used

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  • Microwave frequency anti-distortion and anti-dispersion measurement method based on quantum entanglement light source

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Embodiment Construction

[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circ...

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Abstract

The invention discloses a microwave frequency anti-distortion anti-dispersion measurement method based on a quantum entanglement light source, and the method comprises the following steps: obtaining signal light and idle light with correlation characteristics based on the quantum entanglement light source; modulating a radio frequency signal generated by a microwave signal source to the idle light to obtain idle light carrying the radio frequency signal; after the signal light and the idle light carrying the radio frequency signal are transmitted, respectively acquiring a signal photon arrival time sequence and an idle photon arrival time sequence carrying the radio frequency signal under the reference of a synchronous clock; based on the signal photon arrival time sequence and the idle photon arrival time sequence, obtaining associated photon pairs through coincidence measurement screening; based on the correlated photon pairs obtained through screening, radio frequency anti-distortion and anti-dispersion measurement of the microwave signal source is achieved. According to the invention, the nonlinear harmonic distortion of the microwave frequency modulation signal can be reduced, and the anti-dispersion measurement of the microwave frequency signal can be realized.

Description

technical field [0001] The invention belongs to the technical field of frequency measurement, in particular to a microwave frequency anti-distortion and anti-dispersion measurement method based on a quantum entanglement light source. Background technique [0002] Microwave photonics, which uses photonic technology to process microwave signals, is developing rapidly, and has been extended to many important applications such as high-speed communication and radar at this stage; among them, one of the most important applications of microwave photonics is the use of optical carriers to carry radio frequency signals in wireless communications Transmission in optical fibers is called a radio over fiber (Radio over Fiber, RoF) communication system. The RoF communication system combines the advantages of traditional microwave communication and optical communication, and uses optical carriers to greatly extend the spatial transmission distance of high-frequency microwave signals in op...

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Application Information

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IPC IPC(8): H04B10/2513H04B10/2575H04B10/079H04B10/70
CPCH04B10/2513H04B10/2575H04B10/07951H04B10/70
Inventor 董瑞芳靳亚晴项晓权润爱刘涛张首刚
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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