Few-mode multichannel all-optical noise suppression device based on inter-mode four-wave mixing

Abstract

The invention provides a few-mode multichannel all-optical noise suppression device based on inter-mode four-wave mixing. The few-mode multichannel all-optical noise suppression device comprises a convergence coupling unit, a pumping preprocessing unit, a plurality of signal preprocessing units and a few-mode regeneration unit, wherein the pumping preprocessing unit, the signal preprocessing unitsand the few-mode regeneration unit are connected with the convergence coupling unit. Compared with an existing multichannel all-optical regeneration device, regeneration signals supported by the device are expanded to high-order mode signals in few-mode optical fibers from traditional fundamental mode signals of fundamental mode optical fibers, and simultaneous regeneration of multichannel high-order mode signals is achieved in the mode of sharing continuous pump light. The technical problem that a traditional all-optical noise suppression scheme cannot support a few-mode communication systemis solved, signal degradation caused by deterministic noise and random noise can be eliminated at the same time, the multi-channel processing capacity is provided, and the signal processing cost andcomplexity in the few-mode communication system are reduced.

Description

technical field [0001] The invention relates to the field of optical signal processing, in particular to a few-mode multi-channel all-optical noise suppression device based on inter-mode four-wave mixing. Background technique [0002] As the capacity of the basic mode transmission system is gradually approaching, the space division multiplexing transmission technology has become the main means to improve the system capacity. Among them, the use of multi-mode co-transmission technology provided by few-mode fibers can double the total transmission rate of a single fiber, so it has been extensively studied by optical communication research teams at home and abroad. However, this space-division multiplexing transmission method also brings new types of noise related to modes, such as mode dispersion, mode loss, mode nonlinearity and other factors that degrade signal transmission performance. To solve this kind of noise problem, at present, after the photoelectric conversion is p...

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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a few-mode multi-channel all-optical noise suppression device based on inter-mode four-wave mixing to overcome the technical problem that the traditional all-optical noise suppression scheme cannot support few-mode communication systems , and can simultaneously eliminate signal degradation caused by deterministic noise and random noise, provide multi-channel processing capability, and reduce signal processing cost and complexity in few-mode communication systems

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