3D Optical Waveguide Core Layer Arrangement
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Solution Overview
Problem
Existing optical waveguide devices struggle to three-dimensionally arrange multiple core layers, limiting the complexity and arrangement possibilities of photonic integrated circuits and light emitters/receivers.
Innovation Solution
The optical waveguide device features a substrate with multiple core layers arranged at different heights and crossing each other in a plan view, covered by a cladding layer, allowing for three-dimensional arrangement and increased flexibility in device design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple core layers are arranged in a traditional planar configuration, then the device structure remains simple, but the arrangement flexibility and complexity of photonic integrated circuits are limited
Solution Approach 1:
The patent transitions from a traditional planar (2D) arrangement of core layers to a three-dimensional configuration where core layers are positioned at different heights (Z-axis) and can cross each other in plan view. This dimensional change enables greater arrangement flexibility and complexity without proportionally increasing structural complexity, as the crossing configuration allows multiple cores to coexist in a compact volume.
2Adaptability or versatility
If core layers are positioned at the same height, then the manufacturing process is simpler, but the three-dimensional arrangement capability is lost
Solution Approach 1:
By introducing vertical separation (different heights from the substrate surface) between core layers, the patent enables three-dimensional arrangement capability. The core layers are positioned at distinct Z-axis coordinates, allowing them to cross in plan view without physical interference. This vertical dimension provides an additional degree of freedom for arrangement while maintaining manufacturability through standard layer-by-layer fabrication processes.
Data Source
AI summary
An optical waveguide device includes a substrate and an optical waveguide on a surface of the substrate. The optical waveguide includes a first core layer, a second core layer, and a cladding layer covering the first core layer and the second core layer. The first core layer includes a first part at a first height from the surface of the substrate and a second part at a second height from the surface of the substrate. The second height is smaller than the first height. The second core layer is spaced apart from the first core layer and crosses the first core layer in a plan view.