Multicore Optical Fiber Key Plane Alignment for Routing
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Solution Overview
Problem
Current multicore optical fiber connections do not ensure consistent routing paths, leading to incorrect data transmission between transceivers in data networks, as the fixed core positions within the fibers prevent reorganization of core connections, resulting in lost data when linking transceivers across equipment racks.
Innovation Solution
A method is introduced where multicore optical fibers are connected by aligning key planes at the ends to ensure symmetric core pairing, allowing correct mating of core pairs across fibers, and numbering the cores relative to a key plane for precise alignment and routing, enabling consistent duplex data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional single core fibers are used with reorganizable connectors, then routing flexibility is achieved, but the number of fibers required increases
Solution Approach 1:
Multiple single-core fibers are merged into a single multicore fiber cable, combining multiple transmission channels into one physical medium. This reduces the number of separate fibers needed while maintaining routing flexibility through the ability to selectively activate different core pairs based on connection requirements.
2Quantity of substance
If multicore optical fibers with fixed core positions are used, then fiber quantity is reduced, but routing precision deteriorates
Solution Approach 1:
Core pairs are pre-defined and symmetrically positioned during fiber manufacturing, establishing predetermined routing paths before deployment. This preliminary structuring ensures that when connectors are mated, the symmetric alignment automatically establishes correct routing relationships without requiring complex real-time adjustments.
Solution Approach 2:
While the overall core arrangement maintains symmetry for alignment purposes, individual core pairs are assigned specific routing functions. The asymmetric assignment of functional roles to symmetrically positioned cores enables precise routing control while maintaining physical alignment simplicity.
3Device complexity
If core positions are fixed within MCF, then manufacturing complexity is reduced, but connection reliability worsens
Solution Approach 1:
The routing determination function is extracted from the physical core positioning and assigned to the connector mating mechanism. Connectors incorporate routing logic that identifies and mates corresponding core pairs based on the symmetric key plane alignment, separating the simplicity of fixed core positions from the requirement for reliable routing.
4Manufacturing precision
If symmetric core pairing is implemented, then routing accuracy is improved, but connector complexity increases
Solution Approach 1:
The symmetric key plane alignment mechanism serves multiple functions simultaneously: it provides mechanical alignment reference, establishes rotational orientation, and enables automatic core pair identification. This multi-functionality reduces the need for separate routing identification features in the connector design.
Data Source
Figure 1A~2
Figure 3~4A
Figure 4B~5
AI summary
A method of connecting lengths of multicore optical fibers (MCFs) to one another. First and second lengths of a MCF (210) whose cores are arranged in a certain pattern about the fiber axis to define pairs of cores are provided, and the cores of each pair of cores are disposed symmetrically with respect to a key plane that includes the axis of the fiber. Ends of the first and the second lengths of the MCF are arranged in axial alignment with one another, and the key plane at the end of the first length of the MCF is aligned with the key plane at the end of the second length of the MCF. Each defined pair of cores in the first length of the MCF is thereby positioned to mate with the same defined pair of cores in the second length of the MCF.