Waveguide Component with Dielectric Field Concentration
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Solution Overview
Problem
Integrated optical modulators face a conflict between high modulation efficiency, high modulation bandwidth, and low optical insertion loss, as existing solutions either suffer from high optical losses or require complex and costly manufacturing processes, and the choice of materials is limited by the need for electro-optical activity in the waveguide core.
Innovation Solution
A waveguide component design that includes a high-index waveguide core and electro-optically active casing regions with a dielectric material of high electrical refractive index, allowing for a high modulation field strength without conductive regions near the waveguide, enabling scalable silicon-based production and reduced optical losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conductive regions are placed near the waveguide to achieve high modulation efficiency, then modulation bandwidth is improved, but optical losses increase
Solution Approach 1:
A dielectric material with high electrical refractive index is introduced as an intermediary between the conductive line regions and the electro-optical casing region. This dielectric mediator concentrates the electric field of the modulation signal into the electro-optical material through field enhancement at the dielectric interface, enabling high modulation efficiency without requiring conductive regions in close proximity to the waveguide, thus avoiding optical losses.
Solution Approach 2:
The patent changes the electrical refractive index parameter of the dielectric material to be higher than that of the electro-optical material. This parameter change creates an electric field concentration effect at the interface, enhancing the modulation field strength in the electro-optical region without needing conductive structures near the waveguide, thereby resolving the contradiction between modulation bandwidth and optical losses.
2Productivity
If electro-optical material is used in the waveguide core to achieve high modulation efficiency, then modulation efficiency is improved, but material choice and manufacturing complexity are limited
Solution Approach 1:
The waveguide structure is segmented into distinct functional regions: a standard waveguide core for light guidance, an electro-optical casing region for modulation interaction, and a dielectric region for field enhancement. This segmentation allows each region to be optimized independently - the waveguide core can use standard materials while the casing region contains the electro-optical material, simplifying manufacturing.
Solution Approach 2:
The electro-optical material is moved from the traditional waveguide core position to a casing region surrounding the waveguide. This spatial repositioning in another dimension allows the waveguide core to use standard, easily manufactured materials while the electro-optical material is placed where it can still interact with the guided light through the waveguide structure, reducing manufacturing complexity.
3Productivity
If the waveguide cross-section is reduced to increase electric field strength for efficient modulation, then modulation efficiency is improved, but optical losses increase
Solution Approach 1:
The dielectric material acts as an intermediary that amplifies the electric field strength in the electro-optical casing region without requiring a reduction in waveguide cross-section. The high electrical refractive index of the dielectric creates field concentration at the interface, achieving high modulation efficiency while maintaining a larger waveguide cross-section that supports lower optical losses.
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
This design achieves high modulation efficiency and bandwidth with reduced optical losses, enabling the production of energy-saving and fast modulators suitable for high-data-rate applications in optical communication systems.
Implementation Method 1
The dielectric material of the second casing region has a higher electrical refractive index in the frequency range of the modulation signal than the electro-optical material of the first casing region
Implementation Method 2
electro-optical materials, which react to an externally applied electric field with a quasi-instantaneous change in the optical properties such as refractive index or attenuation
Implementation Method 3
a waveguide, which is at least partially transparent or translucent with respect to light and is arranged in such a way that light can be conducted at least partially through the waveguide
Data Source
AI summary
A waveguide component includes a waveguide, which is at least partially transparent or translucent with respect to light and is set up in such a way that light can be conducted at least partially through the waveguide. The waveguide includes a waveguide core, a first casing region, and a second casing region. The waveguide core is formed from one or more spatially separated elements of at least one waveguide core material. The first casing region, which includes at least one electro-optical material, interacts with light guided in the waveguide. The first casing region is disposed around the one or more elements of the waveguide core. The second casing region includes at least one dielectric material. The second casing region is arranged around the first casing region and/or the waveguide core. The waveguide component further includes at least two line regions that are at least partially electrically conductive.