On-chip photon multi-stage switch based on Si-Ge2Sb2Te5 mixed waveguide

Abstract

The invention discloses an on-chip photon multi-stage switch based on a Si-Ge2Sb2Te5 mixed waveguide, and belongs to the technical field of picosecond laser and continuous laser application. The on-chip photon multi-stage switch is based on a laser multi-pulse effect and an evanescent wave coupling theory. Amorphous Ge2Sb2Te5 is directly coupled with a single-mode Si waveguide, a Ge2Sb2Te5 thin film is deposited through a magnetron sputtering method, and different crystalline states of the Ge2Sb2Te5 are adjusted by adjusting the picosecond laser pulse number and pulse energy to achieve multi-stage switching operation. The on-chip photon multi-stage switch does not need to maintain the energy consumption of a traditional optical switch caused by the thermo-optic effect and the electro-opticeffect, and is a green device. In addition, the Ge2Sb2Te5 has different optical constants in different crystalline states, and the crystalline refractive index and extinction coefficient of the Ge2Sb2Te5 are higher than those of the Ge2Sb2Te5 in an amorphous state, so that the coupling capacity of a material to light and the absorption capacity of the material to the light are different, and multi-stage operation is further realized. The on-chip photon multi-stage switch can be widely applied to optical communication systems.

Description

technical field [0001] The invention relates to an optical component, which belongs to the technical field of picosecond laser and continuous laser application, in particular to a Si-Ge-based 2 Sb 2 Te 5 On-chip photonic multilevel switching of hybrid waveguides. Background technique [0002] Optical switch is an important part of optical communication network, and its switch selectivity is one of the important functions of optical network communication. Especially the integration of waveguide optical switches and other optical devices has attracted more and more attention. Traditional optical switches are mainly based on the electro-optic effect and thermo-optic effect, which need to consume excess energy to maintain the state of the switch, resulting in large static power consumption. Traditional optical switches are very sensitive to temperature changes, which leads to potential stability issues. Moreover, due to the limitation of the electro-optic effect and the the...

AI Technical Summary

Problems solved by technology

Traditional optical switches are mainly based on the electro-optic effect and thermo-optic effect, which need to consume excess energy to maintain the state of the switch, and there is a large static power consumption

Traditional optical switches are very sensitive to temperature changes, which leads to potential stability issues

Moreover, due to the limitations of the electro-optic effect and the thermo-optic effect of the traditional optical switch, the adjustment range of the refractive index is small.

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