Code type converting device for modulating amplitude to frequency based on mode abruption silicon based micro ring

Abstract

A device which is in the technical field of optical fiber communication and is based on the conversion between the amplitude of the mode splitting silicon-base micro-ring to the frequency modulation format comprises the following components: a non-return-to-zero signal generator, a carrier suppression double sideband generation system, a silicon based ring-shaped resonant cavity system and a frequency modulation format demodulation system. The silicon based ring-shaped resonance cavity system comprises a silicon based micro-ring straight waveguide, a coupler, a first polarization controller, a second polarization controller, a power divider and a power monitor. The sidewall of the silicon based micro-ring form a periodical roughness. The first polarization controller is connected with thenon-return-to-zero signal generator. The second polarization controller is connected with the carrier suppression double sideband generation system. The outputs of two polarization controllers are respectively taken as two inputs of the coupler. The output power divider of the silicon based ring-shaped resonance cavity is connected with the frequency modulation format demodulation system and the power monitor. The device according to the invention has the advantages of small volume, simple structure, facility for large scale integration, and coherence of the upper sideband and the lower sideband of the converted frequency modulation format.

Description

technical field [0001] The invention relates to a code conversion device in the technical field of optical fiber communication, in particular to a device for converting amplitude to frequency modulation codes based on mode-splitting silicon-based microrings. Background technique [0002] In optical fiber communication, different modulation patterns are often used in different networks. Non-return-to-zero amplitude modulation codes are often used in metropolitan area networks because of their lower cost, while frequency modulation codes are often used in passive optical networks for broadband access due to their constant amplitude. Therefore, it is necessary to perform code conversion at the interface between the metropolitan area network and the passive optical network. All-optical code conversion is a new and very promising all-optical signal processing technology, which does not require optical-electrical-optical conversion, and Not limited by electronic device bandwidth ...

AI Technical Summary

Problems solved by technology

The conversion rate of this method is high, but the disadvantage is that there is no coherence between the pump light and the continuous light, and the semiconductor optical amplifier used is not suitable for large-scale integration.

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