Multilayered Magneto-Optical Waveguide for Low-Loss Signal Isolation
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Solution Overview
Problem
Existing photonic components for data centers, such as switches, circulators, and isolators, face challenges with high insertion losses, unsatisfactory isolation ratios, and complex integration processes, making them unsuitable for efficient on-chip integration.
Innovation Solution
A multilayered signal guiding structure comprising dielectric waveguide layers with intermediate and cover layers made of magneto-optical materials, which utilizes an external magnetic field to manipulate electromagnetic modes, enabling efficient signal routing with negligible insertion losses and low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional photonic components (switches, circulators, isolators) are used in data centers, then signal routing functionality is achieved, but insertion losses are high and isolation ratios are unsatisfactory
Solution Approach 1:
The patent transitions from planar 2D waveguide configurations to a 3D multilayered vertical structure. Multiple waveguide layers are stacked with magneto-optical material layers in between, creating a three-dimensional architecture that enables simultaneous achievement of low insertion loss and high isolation ratio through vertical mode coupling and magnetic field manipulation.
Solution Approach 2:
The invention employs composite structures combining dielectric waveguide materials with magneto-optical materials (such as garnet layers) in a multilayered configuration. This composite approach leverages the low-loss properties of dielectric waveguides while utilizing the magneto-optical effects of the garnet layers to achieve high isolation ratios through non-reciprocal mode coupling.
2Ease of manufacture
If conventional photonic components are used, then signal routing is achieved, but the integration process is complex and on-chip integration is difficult
Solution Approach 1:
The device is segmented into distinct functional layers: dielectric waveguide layers for signal transmission, magneto-optical material layers for non-reciprocal coupling, and metal layers for magnetic field generation. This segmentation allows each layer to be optimized independently and facilitates modular fabrication processes, reducing overall integration complexity.
Solution Approach 2:
The multilayered structure serves multiple functions simultaneously: the waveguide layers provide signal routing, the magneto-optical layers enable non-reciprocal coupling for isolation and switching, and the metal layers generate magnetic fields. This multi-functionality is achieved within a single integrated structure, eliminating the need for separate components and simplifying on-chip integration.
3Reliability
If magneto-optical materials are used to improve isolation ratio, then isolation performance increases, but power consumption increases due to significant interaction with the materials
Solution Approach 1:
The dielectric waveguide layers act as intermediaries that couple optical modes between the magneto-optical material layers. This indirect coupling mechanism reduces the strength of interaction between light and magneto-optical materials, thereby lowering the power consumption required to generate the magnetic field while still achieving high isolation ratios through the accumulated effect of mode coupling across multiple layers.
Solution Approach 2:
Instead of using a single thick magneto-optical layer that would require high power, the invention uses multiple thinner magneto-optical layers separated by dielectric waveguide layers. Each layer provides partial coupling action, and the cumulative effect across multiple layers achieves the desired high isolation ratio with reduced power consumption per layer.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design allows for simple integration into photonic integrated circuits (PICs) with 100% performance, achieving efficient signal switching, circulation, and isolation without significant interaction with the magneto-optical materials, reducing complexity and power consumption.
Implementation Method 1
at least one intermediate layer (20) comprises a magneto-optical material, MO, and/or the at least two cover layers (30) comprise a magneto-optical material, MO
Data Source
AI summary
Described is a multilayered signal guiding structure, comprising: a plurality of layers, the plurality of layers comprising at least two waveguide layers extending along an extension direction and serving to couple an electromagnetic signal, and at least one intermediate layer disposed between the at least two waveguide layers; at least two cover layers, wherein the at least two waveguide layers are partially or completely arranged between the at least two cover layers, wherein the at least one intermediate layer comprises a magneto-optical material, MO, and/or the at least two cover layers comprise a magneto-optical material, MO. Furthermore, a method for operating a multilayered signal guiding structure is described.