Multi-core fiber optical I/O density in data center switches
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Solution Overview
Problem
Current data center network switches face challenges in increasing data rates due to physical space constraints and I/O density issues, as traditional optical fibers and electro-optical modules are not compatible with high-density requirements, leading to reliability and cooling problems.
Innovation Solution
The use of multi-core fibers (MCFs) inside network devices to increase spatial density and optical I/O density, allowing direct coupling to electronic ASICs and reducing the need for multiple optical fibers, with optical-to-optical connectors that eliminate the need for bulky electro-optical modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional optical fibers and electro-optical modules are used in data center network switches, then data transmission functionality is achieved, but physical space constraints and I/O density issues occur
Solution Approach 1:
The invention segments a single optical fiber into multiple independent light-carrying cores, allowing multiple data channels to coexist within one fiber bundle. This segmentation enables high-density optical I/O connections without proportionally increasing the physical space required, as multiple cores share the same fiber infrastructure.
Solution Approach 2:
The patent transitions from traditional single-core to multi-core fiber architecture, adding the dimension of spatial multiplexing within the fiber. By arranging multiple cores in a two-dimensional grid pattern within each fiber, the system achieves higher I/O density without linearly increasing the fiber bundle's external dimensions.
2Productivity
If more traditional optical fibers are used to increase data rates, then bandwidth is improved, but cooling problems and reliability issues worsen due to increased cabling volume
Solution Approach 1:
The invention merges multiple optical communication channels into a single multi-core fiber bundle, consolidating what would traditionally require multiple separate fibers. This consolidation reduces the overall cabling volume, thereby decreasing heat generation and electromagnetic interference while maintaining high data traffic rates through parallel core utilization.
Solution Approach 2:
The patent changes the fundamental parameter of fiber structure from single-core to multi-core configuration. This parameter change enables higher bandwidth capacity within the same physical envelope, improving productivity while reducing the harmful effects associated with increased cabling volume such as cooling requirements and electromagnetic interference.
3Adaptability or versatility
If electro-optical modules are used for signal conversion, then optical communication functionality is achieved, but device complexity and form-factor constraints occur
Solution Approach 1:
The invention extracts and eliminates the bulky electro-optical conversion modules from the system architecture by implementing optical-to-optical coupling. This extraction simplifies the device by removing unnecessary conversion stages, reducing overall complexity while maintaining full optical communication capability through direct optical path establishment.
Solution Approach 2:
The patent introduces optical-to-optical connectors as intermediaries that enable direct optical coupling between multi-core fibers and network switch components. These connectors serve as mediators that facilitate optical signal transmission without requiring electro-optical conversion, thereby simplifying the system architecture and reducing device complexity.
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 reduces cabling volume, increases data traffic rates, improves ventilation, and decreases electromagnetic interference, while maintaining device reliability and form-factor, by enabling higher optical I/O density and efficient electro-optical conversion within the MCMs.
Implementation Method 1
the first end of the MCF has an angled facet configured to fold an optical path of the optical communication signals toward a surface of the EO chip
Data Source
AI summary
A network device includes an enclosure, a multi-chip module (MCM), an optical-to-optical connector, and a multi-core fiber (MCF) interconnect. The enclosure has a panel. The MCM is inside the enclosure. The optical-to-optical connector, which is mounted on the panel of the enclosure, is configured to transfer a plurality of optical communication signals. The MCF interconnect has a first end coupled to the MCM and a second end connected to the optical-to-optical connector on the panel, for routing the plurality of optical communication signals between the MCM and the panel.