Optical Waveguide Routing with Curved Transitions
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Solution Overview
Problem
Existing optical waveguide systems face challenges in efficiently routing optical signals while minimizing signal leakage, particularly when changes in guiding direction occur.
Innovation Solution
The proposed solution involves a waveguide system with multiple sections extending in different directions on a substrate, where the light is guided from one section to another through total internal reflection, ensuring efficient routing and minimizing signal leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical waveguides use multiple sections extending in different directions to route optical signals, then the routing flexibility and adaptability are improved, but signal leakage increases at direction change points
Solution Approach 1:
The waveguide is divided into multiple straight sections connected by transition regions. Each section maintains a consistent guiding direction, while transition regions facilitate smooth directional changes. This segmentation allows the waveguide to achieve complex routing paths while maintaining low loss in each segment.
Solution Approach 2:
The waveguide employs curved transition regions instead of sharp angles to connect straight sections. These curved sections gradually change the propagation direction of optical signals, reducing abrupt refraction and minimizing signal leakage at direction change points.
2Productivity
If optical waveguides change guiding direction to achieve efficient routing, then the routing efficiency is improved, but signal leakage occurs at direction change points
Solution Approach 1:
Curved transition regions are used to connect waveguide sections with different guiding directions. These curves enable smooth directional transitions that maintain total internal reflection conditions, preventing signal leakage while achieving efficient routing between different locations.
Solution Approach 2:
The waveguide design changes the propagation direction parameter gradually through curved sections rather than abruptly. This continuous parameter change maintains the optical confinement conditions throughout the transition, reducing signal loss while achieving directional changes for efficient routing.
3Reliability
If optical waveguides maintain straight sections for efficient light guidance, then signal transmission efficiency is improved, but routing flexibility is reduced
Solution Approach 1:
The waveguide is segmented into straight transmission sections and curved transition sections. The straight sections maintain high transmission efficiency through consistent total internal reflection, while the curved sections provide the necessary routing flexibility to connect different locations on the substrate.
Solution Approach 2:
Curved sections are strategically placed to connect straight waveguide segments, enabling the overall waveguide path to adapt to different spatial requirements while maintaining efficient light guidance in the straight sections. This combination provides both transmission efficiency and routing flexibility.
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 configuration allows for efficient routing of optical signals with reduced signal leakage, even when changes in guiding direction occur, thereby enhancing the performance of optical systems such as LIDAR devices.
Implementation Method 1
light propagating inside the optical material (or portions thereof) may reflect at one or more walls of the optical material back into the optical material (e.g., total internal reflection (TIR)) and then continue propagating inside the optical material
Data Source
AI summary
One example LIDAR device comprises a substrate and a waveguide disposed on the substrate. A first section of the waveguide extends lengthwise on the substrate in a first direction. A second section of the waveguide extends lengthwise on the substrate in a second direction different than the first direction. A third section of the waveguide extends lengthwise on the substrate in a third direction different than the second direction. The second section extends lengthwise between the first section and the second section. The LIDAR device also comprises a light emitter configured to emit light. The waveguide is configured to guide the light inside the first section toward the second section, inside the second section toward the third section, and inside the third section away from the second section.