Optical Waveguide Board Layout for Low-Loss Multi-Board Interconnects
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Solution Overview
Problem
Existing optical interconnection structures struggle to efficiently connect multiple wiring boards with integrated circuits while minimizing optical loss.
Innovation Solution
An optical-electrical integrated device design featuring a first wiring board with second wiring boards and an optical waveguide board positioned differently on its surface, where each second wiring board is optically connected to the waveguide board via photonic integrated circuits, utilizing various optical coupling methods to minimize optical loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple wiring boards are interconnected using traditional optical interconnection structures, then signal transmission between boards is enabled, but optical loss increases and connection efficiency decreases
Solution Approach 1:
The patent introduces an optical waveguide board as an intermediary component that receives optical signals from multiple second wiring boards and transmits them to the first wiring board. This mediator structure consolidates multiple optical connections into a single waveguide system, reducing optical loss by avoiding multiple individual fiber connections and simplifying the overall interconnection architecture.
Solution Approach 2:
The patent transitions from traditional planar fiber optic connections to three-dimensional optical waveguide integration. The optical waveguide board provides vertical and lateral signal routing capabilities, enabling multiple second wiring boards to connect to the first wiring board through a compact 3D arrangement rather than requiring extensive 2D fiber routing, thereby reducing optical loss and structural complexity.
2Ease of operation
If traditional optical coupling methods are used to connect wiring boards, then optical signal transmission is achieved, but fiber crossing issues and alignment difficulties arise
Solution Approach 1:
The patent replaces the mechanical fiber alignment and coupling system with an integrated optical waveguide system. Instead of requiring precise mechanical alignment of individual fibers between wiring boards, the optical waveguide board provides fixed, pre-aligned optical pathways that eliminate the need for complex mechanical adjustment and reduce manufacturing precision requirements.
Solution Approach 2:
The patent merges multiple separate optical coupling interfaces into a single integrated optical waveguide board. By combining multiple optical connection functions into one unified structure, the system eliminates the need for multiple separate alignment operations, making the optical coupling process easier to implement and maintain.
Data Source
AI summary
includes a first wiring board, a plurality of second wiring boards, each second wiring board of the plurality of second wiring board being equipped with an integrated circuit, and an optical waveguide board. The plurality of second wiring boards and the optical waveguide board are disposed at different positions on an upper surface of the first wiring board in a plan view, and each second wiring board is optically connected to optical waveguide board.