Multi-Layer Optical Waveguides for Non-Intersecting Signal Routing
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Solution Overview
Problem
Existing optical waveguide systems face challenges in routing multiple optical signals along separate paths that do not physically intersect, as they typically require complex alignment and can be prone to interference, especially in applications like LIDAR devices where precise signal routing is critical.
Innovation Solution
A multi-layer optical system comprising substrates in an overlapping arrangement with waveguides on each substrate, allowing for non-parallel optical paths that extend across multiple layers without physical intersection, utilizing optical couplers and mirrors for efficient signal transmission and reception between layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple optical signals are routed along separate paths in existing waveguide systems, then signal routing is achieved, but the system requires complex alignment and is prone to interference
Solution Approach 1:
The patent introduces a vertical dimension by stacking multiple substrates to form a three-dimensional waveguide system. Optical signals are routed along non-parallel paths that extend across multiple layers, allowing paths to overlap in projection without physical intersection. This dimensional transition from 2D planar routing to 3D spatial routing eliminates the need for complex alignment while preventing signal interference.
Solution Approach 2:
The patent divides the optical system into multiple discrete substrate layers, each containing waveguides that carry specific optical signals. By segmenting the routing paths across different physical layers, the system allows independent optimization of each waveguide path while maintaining overall system coherence. This segmentation enables simpler alignment within each layer while achieving complex routing functionality across the stacked structure.
2Adaptability or versatility
If optical paths are routed in the same plane, then routing flexibility is improved, but interference between signals increases
Solution Approach 1:
The patent resolves the conflict between routing flexibility and signal interference by transitioning from two-dimensional planar routing to three-dimensional spatial routing. Multiple optical paths can overlap when projected onto a common plane, providing routing flexibility, while the vertical separation between substrate layers ensures no physical intersection occurs, eliminating signal interference. This is achieved through non-parallel optical paths that extend across multiple stacked layers.
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 efficient routing of multiple optical signals along separate paths within the same optical system, reducing interference and enhancing the accuracy and reliability of systems like LIDAR devices by allowing for overlapping yet non-intersecting optical paths, thereby improving signal transmission and reception.
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))
Data Source
AI summary
One example system comprises a plurality of substrates disposed in an overlapping arrangement. The plurality of substrates includes at least a first substrate and a second substrate. The system also comprises a first waveguide disposed on the first substrate to define a first optical path on the first substrate. The first waveguide is configured to guide light along the first optical path and to transmit, at an output section of the first waveguide, the light out of the first waveguide toward the second substrate. The system also comprises a second waveguide disposed on the second substrate to define a second optical path on the second substrate. An input section of the second waveguide is aligned with the output section of the first waveguide to receive the light transmitted by the first waveguide. The second waveguide is configured to guide the light along the second optical path.