Visual Port Indicators in Photonic Circuit Schematics
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Solution Overview
Problem
In photonic integrated circuits, incompatible ports with different cross-sectional shapes and materials can lead to unacceptable losses, back reflection, and crosstalk when converting schematic designs to physical layouts, as these issues are not easily discovered until the physical layout stage, increasing design time and cost.
Innovation Solution
The use of visual indicators such as color, fill patterns, or outlines to differentiate ports with different structures in schematic designs, allowing designers to identify compatible and incompatible ports during the schematic design phase, thereby reducing the need for transition components and minimizing design errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual indicators are added to differentiate port structures, then port compatibility identification is improved, but schematic complexity increases
Solution Approach 1:
The patent applies color coding to visually differentiate port structures in schematic diagrams. Different port types (e.g., waveguide ports, microwave ports, lumped port ports) are represented by distinct colors, enabling designers to quickly identify port compatibility issues without increasing functional complexity. This visual encoding system resolves the contradiction by providing precise port identification through color while maintaining schematic simplicity.
2Reliability
If port structure verification is performed during schematic design phase, then design errors are reduced, but computing resources increase
Solution Approach 1:
The patent implements port structure verification during the schematic design phase, performing compatibility checks before the physical layout stage. The system automatically detects incompatible port connections (e.g., connecting waveguide ports directly without transition components) and alerts designers early. This preliminary verification reduces design errors and rework while optimizing computing resource usage by performing lightweight graphical analysis rather than full electromagnetic simulation at the schematic level.
Data Source
AI summary
In one aspect, a method for displaying incompatible ports at the schematic design stage comprises the following. A schematic of a photonic integrated circuit is accessed. The schematic comprises a plurality of optical components that have ports, and the optical components are connected at their ports. A processor determines the structures of the ports. Typically, the structure of a port is determined by the cross-sectional shape and the material(s) of the port. The schematic of the photonic integrated circuit is displayed, with different visual indicators for ports with different structures. For example, ports with different structures may be represented by symbols of different colors, different outlines, different fill patterns or other types of non-textual visual indicators.