Photo-generated light-borne terahertz passive optical network system and transmission method

Abstract

The embodiment of the invention discloses a photo-generated optical terahertz passive optical network system and a transmission method, and relates to the technical field of optical communication. Thesystem comprises an optical line terminal, a feed-in optical fiber, a far-end node, a distributed optical fiber and an optical network unit, at an optical line terminal, a comb-shaped spectrum generator driven by a radio frequency signal generator generates a group of multi-wavelength optical carriers with coherent optical phases, the multi-wavelength optical carriers are divided into three pathsby an optical branching device, one path is used as a data optical carrier, and the other two paths are used as beat frequency optical carriers for optical heterodyne beat frequency. The three pathsof optical carriers are transmitted to a far-end node through respective feed-in optical fibers, and the far-end node is connected to each optical network unit through a distributed optical fiber. According to the invention, the point-to-multipoint flexible configuration of the carrier frequency above hundreds of GHz and the transmission purpose of bidirectional receiving and transmitting are realized.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical-generated optical-carrying terahertz passive optical network system and a transmission method. Background technique [0002] With the explosive growth of demand for mobile data traffic, low-frequency spectrum resources are increasingly tight, and the bandwidth limitation of millimeter-wave wireless communication is becoming more and more obvious. The carrier frequency of wireless communication has begun to develop towards the terahertz (THz) Refers to electromagnetic waves with a frequency range of 0.1-10 THz, which is 1-4 orders of magnitude higher than the microwave frequency band, and the amount of information transmitted has a significant increase in orders of magnitude, and can even provide a transmission rate comparable to that of optical fibers. Combined with high-order coding and modulation technology and multi-dimensional multiplexing mechanism, ...

AI Technical Summary

Problems solved by technology

The light-generated light-borne terahertz passive optical network system and transmission method have become a promising research direction in the future, but so far, there is still a lack of feasible solutions, and they are limited to microwave and millimeter waves.

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