Optical carrier wireless communication system and method based on Rydberg atom six-wave mixing

Abstract

The invention discloses an optical carrier wireless communication system and method based on Rydberg atom six-wave mixing. The system comprises a cesium bubble, a microwave source, a signal generator,a signal modulator, an optical fiber, a photoelectric detector and a signal amplifier; the microwave source generates microwaves, the signal generator generates baseband signals, and the signal modulator is used for modulating the baseband signals to the microwaves to generate modulated microwaves; the cesium bubble converts the modulated microwaves into modulated light waves; the photoelectric detector is used for receiving the modulated light wave; and the signal amplifier is used for amplifying the electric signal output by the photoelectric detector. According to the optical carrier wireless communication system provided by the invention, the coherent conversion of microwaves and light waves in a Rydberg atom six-wave mixing process is utilized; amplitude modulation of microwave by baseband signals is converted into amplitude modulation of light waves, the modulated light waves are transmitted through an optical fiber, finally, the modulated light waves are received through a photoelectric detector, demodulation is not needed, the baseband signals are directly obtained, and therefore the radio over fiber communication technology is achieved.

Description

technical field [0001] The invention relates to an optical carrier wireless communication system and a communication method thereof, in particular to an optical carrier wireless communication system based on Rydberg atomic six-wave mixing and an optical carrier wireless communication method based on Rydberg atomic six-wave mixing . Background technique [0002] The traditional optical carrier wireless communication system modulates the baseband signal to the radio frequency carrier, and then uses the electro-optical crystal to realize the modulation of the light wave by the radio frequency signal, thereby indirectly realizing the modulation of the light wave by the baseband signal, and transmits the modulated light wave through the optical fiber, and finally modulates the modulated light wave. Demodulation is performed to obtain a baseband signal. In 2012, the Shaffer research group of Oklahoma University in the United States and the Pfau research group of the University of...

AI Technical Summary

Problems solved by technology

[0003] At present, experimental measurements and theoretical analysis show that the traditional optical wireless communication system needs complex circuit connection and filter amplification stage, and the thermal noise is relatively large

However, the channel capacity of the optical wireless communication system based on thermal atom EIT-AT splitting phenomenon is limited by factors such as laser power, laser linewidth, transition broadening, shot noise, atomic number density, and Rydberg atom decoherence; and the Communication can only be carried out through amplitude modulation, and information transmission cannot be carried out through phase modulation

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