Full-light multicast optical switch system

Abstract

The invention relates to an all-optical multicast optical switch system. A control signal is continuous light with different wavelengths and is reversely input into an SOA-XGM wavelength converter; one part of input signal light enters the wavelength converter, is reversely converted onto control light through cross-gain modulation, and is output in a corresponding second-stage SOA-XGM wavelengthconverter through a wavelength routing module; the other part of the input signal light is changed into the continuous light through a traveling wave semi-conductor optical amplifier and input into a1 multiplied by N coupler through an optical isolator, each output end of the 1 multiplied by N coupler is respectively connected with a corresponding second-stage SOA-XGM wavelength converter; in the second-stage wavelength converter, the information on the control light is reversely converted onto the wavelength of the signal light again through the cross-gain modulation, the output of the second-stage wavelength converter is the output of the all-optical multicast optical switch system. The all-optical multicast optical switch system solves the problem of optical signal multicast in the optical switch system by taking advantage of two times of wavelength transformations and the gain saturation of the SOA.

Description

technical field [0001] The present invention relates to an all-optical multicast optical switch system, in particular to an all-optical multicast optical switch system based on semiconductor optical amplifier cross gain modulation (SOA-XGM) optical wavelength converter and semiconductor optical amplifier (SOA) gain saturation The invention solves the problems of all-optical switch control, optical switch switching and optical signal multicast, and belongs to the technical field of optical communication. Background technique [0002] Wavelength Division Multiplexing (WDM) transmission technology and all-optical switching technology are the key technologies of all-optical network. Optical switches play an important role in both. In WDM transmission technology, the applications of optical switches include wavelength switching, wavelength adaptation, optical timing extraction, optical code stream regeneration, optical return-to-zero code (RZ code) and optical non-return-to-zero...

AI Technical Summary

Problems solved by technology

The former has a simple structure, fast switching speed, and low switching energy, but it is inconvenient to cascade, which is not conducive to integration

The latter cascading is relatively convenient and conducive to integration, but the polarization control is complicated, and the contribution of the control light to the phase shift is small

[0006] The all-optical switches under study also include dual-wavelength Mach-Zehnder (Mach-Zehnder) optical switches and Kerr-type optical switches, but their processes are relatively complicated, and there is a long way to go from practical use.

In addition, the existing all-optical switches can only achieve single-channel optical on-off, and cannot effectively form an optical switch matrix for optical switching of optical cross-connects

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