Bidirectional reconfigurable high-capacity meta-optical broadcast communication method and system

Abstract

The invention discloses a bidirectional reconfigurable high-capacity meta-optical broadcast communication method and a system, and relates to the field of space optical communication. The method comprises the following steps: a downlink loads a pseudo-random code on a wavelength division multiplexing optical carrier of analog fiber-to-the-home, then carries out the time correlation removal of adjacent wavelength division multiplexing signals; after being subjected to polarization control, the light waves are normally incident to the metasurface broadcaster to be divided into a plurality of light spots, and by adjusting the polarization state of the light waves incident to the metasurface broadcaster, wavelength division multiplexing signals with multiple wavelengths of each light spot are distributed to different users one by one; in the uplink, each user receives wavelength division signals of multiple wavelengths, allocates an optical carrier, loads a pseudo-random code on the optical carrier, transmits the pseudo-random code to a metasurface broadcasting device through polarization control, and then carries out detection and error code test on the optical signal after collimation. The complexity of the whole system can be reduced.

Description

technical field [0001] The invention relates to the field of space optical communication, in particular to a two-way reconfigurable large-capacity ultra-light broadcast communication method and system. Background technique [0002] With the development of society and economy and the progress of science and technology, the broadband mobile services of consumer electronic terminals such as smartphones and tablet computers, as well as the interconnection and interaction between many devices that constitute the Internet of Things, make the demand for wireless communication grow explosively. New mobile frequency bands such as sub-terahertz have also been gradually developed and utilized. However, the continued exponential growth of data demands is depleting the spectrum and capacity of wireless communications. Frequency shortage and capacity demand have become the most difficult problems restricting the development of wireless communication. [0003] The optical frequency band ...

AI Technical Summary

Problems solved by technology

At present, the main active light control methods are traditional optoelectronic devices such as microelectromechanical system galvanometers and spatial light modulators, which are large in size, high in cost, difficult to integrate, and limited in system transmission angles, resulting in complex systems.

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