Waveguide Modifier Layer Structure for Optical Length Tuning
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Solution Overview
Problem
Existing waveguide structures require physical dimension changes to tune optical length, limiting flexibility in photonic integrated circuit (PIC) design.
Innovation Solution
Incorporating waveguide modifier layers that modify the effective refractive index without altering the physical dimensions, allowing for greater flexibility in PIC design by tuning optical length for specific modes of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If physical dimensions of the waveguide structure are varied to tune optical length, then optical length can be adjusted, but flexibility in PIC design is reduced
Solution Approach 1:
The patent changes the refractive index parameter of the waveguide layer by incorporating modifier layers with different refractive indices. This allows tuning of the optical length through parameter modification rather than physical dimension changes, thereby maintaining design flexibility while achieving the desired optical path length adjustment.
Solution Approach 2:
The waveguide structure employs composite materials by combining the base waveguide layer with modifier layers having different refractive indices. This composite structure enables independent control of optical properties without altering the physical geometry, resolving the contradiction between optical length tuning and design flexibility.
2Adaptability or versatility
If waveguide modifier layers are incorporated to modify effective refractive index, then optical length can be tuned without changing physical dimensions, but device complexity increases
Solution Approach 1:
The modifier layers are applied locally to specific regions of the waveguide structure where refractive index modification is needed. This localized approach enables optical length tuning without requiring complex modifications throughout the entire device, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The patent introduces a new dimension of control by adding vertical layering (modifier layers on top of the waveguide layer) rather than modifying horizontal dimensions. This dimensional approach allows optical length tuning through refractive index changes in the vertical dimension, avoiding complexity in the horizontal plane.
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
Enables flexible design of PICs by adjusting optical length without changing physical dimensions, facilitating precise control over light propagation and mode interaction.
Implementation Method 1
one or more waveguide modifier layers comprising a first material for modifying a waveguide function of the waveguide layer
Data Source
AI summary
A waveguide structure comprising: a substrate; a waveguide layer on the substrate; a cladding layer in contact with a first side of the waveguide layer, the waveguide layer between the cladding layer and the substrate; and a first waveguide modifier layer comprising a first material for modifying a waveguide function of the waveguide layer, the first waveguide modifier layer in contact with the cladding layer and having a width along a first axis less than a width, parallel to the first axis, of the cladding layer, the first axis perpendicular to a second axis corresponding with a light propagation direction within the waveguide layer. There is a method of manufacturing a waveguide structure.