Optical communication system based on hybrid mode multiplexing

Abstract

The invention relates to an optical communication system based on hybrid mode multiplexing, specifically an optical communication method and device based on hybrid mode multiplexing. The method comprises the steps that optical signal modulation units generate single-wavelength fundamental mode modulation output optical signals under modulation of a baseband data signal; hybrid mode multiplexing optical signals are formed; the hybrid mode multiplexing optical signals are transmitted in a transmission medium, and hybrid mode multiplexing output optical signals are generated; single-wavelength channel or wavelength division multiplexing multichannel fundamental mode output optical signals are formed according to the hybrid mode multiplexing output optical signals; multi-way single-wavelength channel fundamental mode output optical signals are formed according to the wavelength division multiplexing multichannel fundamental mode output optical signals; each single-wavelength channel fundamental mode output optical signal passes an optical signal modulation unit, thereby outputting transmitted data information. According to the method and the device, mode resources of a free space or communication transmission few-mode optical fibers are utilized fully, mode utilization rates can be improved to the greatest extent, and the transmission capability and transmission performance of an optical communication system are increased.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to an optical communication system based on mixed mode multiplexing, in particular to an optical communication method and device based on mixed mode multiplexing. Background technique [0002] With the rapid growth of various data services, especially in the era of big data represented by the next-generation Internet, Internet of Things, and smart cities, the demand for various information service traffic prompts the optical communication system to update the transmission rate and capacity in a timely and rapid manner. Among them, the optical fiber communication system, as the infrastructure of the information highway, is an optical communication system that urgently needs to update the transmission rate and capacity. At present, due to the influence of fiber nonlinear Kerr effect, the transmission capacity of single-mode fiber is close to the performance limit. T...

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Problems solved by technology

However, both the linear polarization mode and the orbital angular momentum mode can be regarded as a degenerate combination of fiber eigenvector modes, so their transmission in the fiber may be caused by crosstalk between modes, especially degenerate modes within the module. The crosstalk between them will lead to the degradation of system transmission performance

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