Hexagonal Optical Fibre Ribbon Stacks for High-Density Cable Packing
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Solution Overview
Problem
Conventional high fibre count optical fibre cables suffer from poor packing efficiency, increased cable diameter, inefficiencies at junction points, ribbon collapse under load, inconvenient ribbon identification, and lower optical performance, with impractical linear scaling for high fibre counts.
Innovation Solution
The optical fibre ribbons are arranged in a hexagonal configuration with each ribbon offset between 25% to 75% of the pitch, forming a parallelogram shape to enhance packing density and reduce stack height, resulting in a packaging density greater than 80%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If optical fibre ribbons are arranged in conventional linear stacking, then manufacturing is simple, but packing efficiency is poor and cable diameter increases
Solution Approach 1:
The patent applies hexagonal geometry (a form of curved/polygonal arrangement) to organize optical fibre ribbons in a compact hexagonal stack. This geometric transformation from linear to hexagonal arrangement achieves superior packing efficiency (greater than 80%) while maintaining structural integrity and reducing cable diameter.
Solution Approach 2:
The patent transitions from conventional linear/planar ribbon arrangement to a three-dimensional hexagonal stacking configuration. By utilizing vertical stacking with offset positioning (25%-75% offset) and hexagonal pattern formation, the design optimizes spatial utilization across multiple dimensions, achieving high fibre count in compact cable structures.
2Quantity of substance
If more optical fibres are added to increase fibre count, then communication capacity increases, but cable diameter increases and handling becomes difficult
Solution Approach 1:
The patent implements nested stacking where multiple layers of optical fibre ribbons are positioned within a hexagonal configuration. Each ribbon layer is offset and nested within the structural envelope defined by previous layers, allowing high fibre count to be achieved while containing the overall cable diameter through efficient vertical and radial nesting.
3Strength
If optical fibre ribbons are stacked conventionally, then installation is straightforward, but ribbons collapse under load or force at centre
Solution Approach 1:
The patent pre-organizes optical fibre ribbons into rigid hexagonal stacks with offset positioning (25%-75% offset) before cable assembly. This preliminary structuring creates inherent mechanical strength and load distribution pathways, preventing ribbon collapse under subsequent installation loads while maintaining ease of handling through standardized hexagonal unit construction.
4Quantity of substance
If optical fibre ribbons are arranged densely, then packing efficiency improves, but ribbon identification becomes inconvenient
Solution Approach 1:
The patent segments the high fibre count cable into standardized hexagonal stack units. Each hexagonal stack contains a specific number of offset ribbons arranged in a repeatable pattern, enabling modular identification and handling. This segmentation maintains high packing efficiency while providing structured organization that simplifies ribbon identification through consistent geometric patterns.
Data Source
AI summary
The present disclosure provides a method for stacking a plurality of optical fibre ribbons in an optical fibre cable. The method includes a step of arranging a plurality of optical fibre ribbon stacks in a hexagonal arrangement in the optical fibre cable. The method may further include stacking the plurality of optical fibre ribbons to form an optical fibre ribbon stack such that the optical fibre ribbon stack may have a parallelogram shape. Each optical fibre ribbon is placed at an offset from adjacent optical fibre ribbon. The optical fibre ribbon stack may have a stack height. In addition, each optical fibre ribbon of the plurality of optical fibre ribbons may have a ribbon height. The hexagonal arrangement may have the packaging density greater than 80%.