Multi-mode interference optical switch with controlled input position and preparation method of multi-mode interference optical switch

Abstract

The invention discloses a multi-mode interference optical switch with the controlled input position. The multi-mode interference optical switch comprises a plane optical wave optical path chip, a light source, an input optical fiber array and an electric and automatic core adjusting device. The plane optical wave optical path chip comprises a silicon substrate, a silicon dioxide buffer layer, a waveguide and a covering layer. The waveguide comprises an input-stage single-mode waveguide, a middle-stage multi-mode waveguide and n output-stage single-mode waveguides. The light source is connected with the input end of the input optical fiber array. The output end of the input optical fiber array is connected with the input end of the input-stage single-mode waveguide. The output end of the input-stage single-mode waveguide is connected with the input ends of the n output-stage single-mode waveguides through the middle-stage multi-mode waveguide. The input optical fiber array is fixedly connected to the electric and automatic core adjusting device. The on-off mode of the optical switch is adjustable, the technology and the structure are simple, and the cost is low. The invention further discloses an adjusting method of the multi-mode interference optical switch with the controlled input position. The adjusting method is simple and capable of rapidly adjusting the on-off mode of the optical switch.

Description

technical field [0001] The invention belongs to the technical field of integrated photonic devices, and in particular relates to an input position controlled multi-mode interference optical switch and a preparation method thereof. Background technique [0002] The optical switch is a key device that can convert the channel of the optical signal in the optical transmission process, and can be widely used in the realization of functions such as routing selection, wavelength selection and optical cross-connection of the all-optical layer. According to the classification of the working medium, optical switches can be divided into free space optical switches and planar waveguide type (hereinafter referred to as: PLC type) optical switches. [0003] The PLC optical switch is manufactured by semiconductor technology, and has the advantages of compact structure, batch production, and high stability. Among them, the PLC-type optical switch based on silicon dioxide on silicon (full n...

AI Technical Summary

Problems solved by technology

The existing adjustable PLC-type optical switch mainly uses the principles of electro-optic effect, thermo-optic effect, magneto-optic effect, acousto-optic effect and other principles of the material, and needs to add a refractive index modulation module to change the refractive index of the multimode waveguide to realize the switch state adjustable. The production process is difficult, the structure is complex, and the cost is high

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