Hollow Metal Waveguide Optical Interconnection Fabric
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Solution Overview
Problem
Existing optical interconnection systems face challenges in achieving high coupling efficiency, low cost, reconfigurability, and reliability for connecting electronic components, particularly in large-scale interconnections between multiple components, due to limitations in waveguide materials and routing technologies.
Innovation Solution
The use of hollow metal waveguides with highly reflective metallic walls and dynamic reconfigurable crosspoint switches, incorporating periscope prisms and light valves, allows for efficient routing of optical signals with low optical loss and fast switching times, enabling connections between any input and output nodes in a circuit switched optical interconnection fabric.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional waveguide materials and routing technologies are used, then system cost and complexity are reduced, but coupling efficiency and optical loss performance deteriorate
Solution Approach 1:
The patent changes the material parameter of waveguides from traditional dielectric materials to hollow metal waveguides with highly reflective metallic walls. This parameter change reduces optical loss by utilizing the high reflectivity of metals at optical frequencies, while the modular crossbar switch architecture maintains manageable system complexity through standardized components and routing logic.
2Adaptability or versatility
If static optical routing is used, then device complexity is reduced, but adaptability and reconfigurability deteriorate
Solution Approach 1:
The patent implements dynamic reconfigurability through crosspoint switches that can change their routing state based on control signals. The system transitions from static optical paths to dynamically configurable paths, allowing the optical fabric to adapt to different connectivity requirements while maintaining a relatively simple underlying hardware architecture through standardized crossbar switch modules.
3Productivity
If high-speed optical switching is implemented, then productivity and data rate are improved, but switching precision and control complexity worsen
Solution Approach 1:
The patent replaces mechanical or electronic switching mechanisms with all-optical switching using light valves and reflective elements. This substitution enables high-speed operation at optical frequencies (approaching terahertz) while simplifying control precision requirements, as the optical elements respond directly to control signals without mechanical inertia or electronic bandwidth limitations.
4Adaptability or versatility
If dense interconnection fabric is used, then adaptability and connectivity are improved, but optical loss and signal degradation worsen
Solution Approach 1:
The patent segments the optical interconnection fabric into modular crossbar switch units, each handling a subset of inputs and outputs. This segmentation allows for optimized local routing paths with minimal crossings, reducing cumulative optical loss while maintaining overall system adaptability. The modular architecture enables scaling connectivity without proportionally increasing path length and loss.
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 approach results in a low-loss, cost-effective, and dynamically reconfigurable optical interconnection fabric capable of handling high data rates, approaching terahertz frequencies, with fast switching speeds and reliable operation, addressing the limitations of traditional waveguide systems.
Implementation Method 1
hollow metal waveguides with highly reflective metallic walls
Implementation Method 2
incorporating periscope prisms and light valves
Data Source
Figure 1
Figure 2A~2B
Figure 3A
AI summary
A circuit switched optical interconnection fabric (100) includes a first hollow metal waveguide (115) and a second hollow metal waveguide (120) which intersects the first hollow metal waveguide (115) to form an intersection (122). An optical element (125) within the intersection (122) is configured to selectively direct an optical signal between the first hollow metal waveguide (115) and a second hollow metal waveguide (120).