Optical Switch Assembly Topologies for Scalable Datacenter Traffic
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Solution Overview
Problem
Current CMOS technology in datacenter switches faces challenges in sustaining the projected rise in data traffic, and existing optical switches are constrained by size and input-output configurations, limiting their scalability and efficiency.
Innovation Solution
The integration of electromechanical optical switches with multimode combiners and micro-electromechanical systems (MEMS) in crossbar and modified Spanke-Beneš network topologies, enabling scalable and efficient optical switch assemblies that support single and multiple modes of light propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CMOS technology is used for datacenter switches, then manufacturing scalability is maintained, but the ability to sustain projected rise in data traffic is compromised
Solution Approach 1:
The patent replaces traditional CMOS electronic switches with optical switches that use light instead of electrical signals. This substitution enables the system to handle projected rises in data traffic more effectively, as optical technology provides higher bandwidth and is not constrained by the physical limitations of CMOS scaling. The optical switch assembly includes multiple optical switches configured in specific topologies (crossbar or modified Spanke-Beneš) to achieve the required data traffic capacity.
Solution Approach 2:
The patent divides the optical switching system into multiple modular optical switches arranged in specific network topologies. Rather than using a single large CMOS switch, the system segments the switching function across multiple optical components (including 1×N switches and N×M switches) that can be independently optimized and scaled. This segmentation allows the system to sustain higher data traffic loads while maintaining manufacturing feasibility.
2Productivity
If optical switches are implemented, then data traffic capacity is improved, but size constraints and input-output configuration limitations increase device complexity
Solution Approach 1:
The patent designs optical switch assemblies that can be configured in multiple standard topologies (crossbar and modified Spanke-Beneš), making the same basic optical components versatile enough to serve different datacenter networking requirements. The optical switches can be arranged in various input-output configurations without requiring fundamentally different hardware, reducing overall system complexity while maintaining high data traffic capacity.
Solution Approach 2:
The patent employs nested hierarchical structures in the optical switch assembly, where smaller optical switching units (1×N switches) are nested within larger switching fabrics (N×M switches). This nested arrangement allows complex high-capacity switching functions to be built from simpler modular components, making the overall device complexity manageable while achieving the required data traffic handling capability.
3Use of energy by moving object
If optical switches are used, then power consumption is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates preliminary alignment and calibration procedures during the manufacturing and assembly process of optical components. Optical switches and their interconnections are pre-aligned and tested before final deployment, ensuring that the precise optical paths required for low-power operation are established correctly from the outset. This preliminary action reduces the need for complex real-time adjustments and maintains manufacturing precision requirements at achievable levels.
Solution Approach 2:
The optical switch assembly includes self-aligning and self-calibrating mechanisms that automatically compensate for minor manufacturing tolerances. The optical components are designed to self-adjust during initial operation, reducing the stringency of manufacturing precision requirements while maintaining the low power consumption benefits of optical switching technology.
Data Source
AI summary
Some embodiments of the present disclosure are directed to an architecture of optical networks with optical switches. For example, an optical switch assembly may include a first switch including first switch outputs, where the first switch may be configured to have a first switch orientation corresponding to one of the first switch outputs, a second switch including second switch outputs, where the second switch may be configured to have a second switch orientation corresponding to one of the second switch outputs, a first optical element configured to receive a first switch output, receive a second switch output, and transmit the first switch output and the second switch output via a first combined output, and a second optical element configured to receive another first switch output, receive another second switch output, and transmit the other first switch output and the other second switch output via a second combined output.