Cable Breakout Assembly Segmented Housing Design
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Solution Overview
Problem
Existing multi-fibre optical cables face challenges in terminating individual fibres due to their close packing, leading to difficulties in maintaining mechanical, environmental, and optical integrity during the breakout process, with previous solutions providing inadequate mechanical support and prone to joint failure under tensile loads.
Innovation Solution
A breakout assembly comprising two housing segments that securely encapsulate individual fibres, using furcation tubes and crimp sleeves, with resin adhesive or gel material to support the fibres and withstand axial pull forces, ensuring mechanical and environmental protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heat shrink tubing is used to join furcation tubing to the multi-fibre cable, then the fibres are protected and organised, but the joint lacks sufficient tensile strength and may fail under pull loads
Solution Approach 1:
The housing is divided into a first housing segment and a second housing segment that can be assembled separately around the cable and furcation tubing. This segmentation allows each segment to be optimised for specific functions (cable retention vs fibre protection) and enables the housing to withstand higher tensile loads through distributed structural support rather than relying on a single weak heat shrink joint.
Solution Approach 2:
The housing segments are formed from rigid material that provides structural strength, combining mechanical support functions that previously required multiple separate components (heat shrink tubing, strength members, protective housing). This composite structural approach creates a joint capable of withstanding specified tensile loads while maintaining fibre protection.
2Ease of manufacture
If heat shrink is applied during manufacture to join furcation tubing, then fibres are organised, but fibres may bend or kink around the breakout point degrading optical performance
Solution Approach 1:
The housing segments are pre-formed with channels and recesses that guide fibre positioning before assembly. The first housing segment includes a cable retention feature that secures the multi-fibre cable in a predetermined position, and the second housing segment includes furcation tubing retention features that guide individual fibres into proper alignment. This preliminary structuring prevents fibre bending and kinking during the breakout process while maintaining ease of manufacture.
Solution Approach 2:
The housing segments act as intermediary structures between the multi-fibre cable and the furcation tubing. The first housing segment provides a transition zone with a cable retention feature, and the second housing segment provides furcation tubing retention features, creating a controlled environment that guides fibres through the breakout process without bending or kinking.
3Quantity of substance
If fibres are closely spaced and packed together in multi-fibre cable, then cable density is improved, but it becomes difficult to manipulate and organise individual fibres for termination
Solution Approach 1:
The housing is segmented into two distinct sections: the first housing segment that receives and organizes the closely packed multi-fibre cable, and the second housing segment that receives and separates individual fibres into furcation tubing. This segmentation provides a transition zone where fibres can be systematically separated while maintaining cable density benefits.
Solution Approach 2:
The housing segments provide a three-dimensional structure with channels and recesses that guide fibres from the dense cable configuration into separated furcation tubing. The first housing segment includes a cable retention feature that positions the cable, and the second housing segment includes furcation tubing retention features that distribute fibres in different spatial directions, making manipulation easier while maintaining high fibre density in the cable itself.
4Ease of operation
If breakout devices are used to receive and spread individual fibres, then fibre organisation is improved, but the devices become complex and difficult to assemble
Solution Approach 1:
The housing combines multiple functions into a single integrated structure: cable retention, fibre guidance, furcation tubing support, and mechanical protection. The first housing segment includes a cable retention feature, and the second housing segment includes furcation tubing retention features, eliminating the need for separate breakout devices and reducing assembly complexity.
Solution Approach 2:
The housing segments are designed as universal components that can be used with different multi-fibre cable types and configurations. The first housing segment's cable retention feature and the second housing segment's furcation tubing retention features provide adaptable support for various fibre counts and cable structures, reducing the need for multiple specialized devices.
Data Source
AI summary
A breakout assembly for transitioning a multi-fibre optical cable into one or more individual fibres is disclosed. The breakout assembly includes a first housing segment engageable at a first end to the cable and engageable at a second end with one or more furcation tubes that each receive an individual fibre from the cable, and a second housing segment engageable at a first end to the cable and engageable at a second end with one or more furcation tubes that each receive an individual fibre from the cable. The first housing segment is securable to the second housing segment so as to encapsulate at least a portion of the individual fibres as they break out from the cable.