A compact three-way wavelength division multiplexer/demultiplexer and its implementation method

Abstract

The present invention provides a compact three-dimensional wavelength division multiplexing / demultiplexing device and an implementation method thereof. The compact three-dimensional wavelength division multiplexing / demultiplexing device comprises a microring resonator, a micro-strip metal coil, and two bar-type strap straight waveguides arranged at two sides of a nonreciprocal microring resonator,coupled with the microring resonator and configured to perform optical signal input / output; the two ends of the two bar-type strap straight waveguides are respectively provided with first, second, third and fourth optical signal output / input ports, and uniform waveguide Bragg reflection gratings are etched at the second port; the microring resonator comprises a microring bending waveguide and a magnetic rotary medium arranged at the inner wall of the microring bending waveguide, and an external static magnetic field required by work of the magnetic rotary medium around the current passing through in the metal coil is generated. The current direction in the metal micro-strip metal coil is changed to achieve the switching of the system between the three-dimensional wavelength division multiplexing device and the demultiplexing device. The compact three-dimensional wavelength division multiplexing / demultiplexing device and the implementation method thereof are simple in structure, high in isolation, low in power loss, little crosstalk, compact and convenient to integrate, can achieve large-scale optical waveguide integration, can perform batch production to reduce the cost and is easy to promote and apply.

Description

technical field [0001] The invention belongs to the technical field of integrated optics, and relates to a multiplexer / demultiplexer, more specifically, to a compact TE mode wavelength division multiplexer / demultiplexer based on waveguide gratings and non-reciprocal microring resonators. Demultiplexer and its implementation. Background technique [0002] Non-reciprocal photonic devices are indispensable and important components in optical communication systems, mainly including isolators and circulators, whose function is to enable unidirectional transmission of light. The isolator is a two-port device, which is mainly used to protect the laser from the interference of unfavorable reverse transmission light. The circulator is a multi-port isolator with similar functional characteristics to the isolator. In recent years, the application of non-reciprocal devices in other fields of optical communication has also been explored and developed. For example, bidirectional multiple...

AI Technical Summary

Problems solved by technology

However, the existing on-chip three-way device has many defects, such as the inability to switch between wavelength division multiplexing and demultiplexing, the degree of photon integration is not high, and the overall size is large

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