Fiber Optic Furcation Unit Isolating Tensile Forces
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Solution Overview
Problem
Conventional methods for furcating fiber optic cables, such as using heat-shrink tubing and epoxy, lead to damage of optic fibers due to direct transmission of tensile forces and result in significant transmission loss with insertion-type connectors.
Innovation Solution
A fiber optic cable assembly with a furcation unit that includes a housing with channels for furcation tubes, allowing optic fibers to slide longitudinally and reducing the risk of damage by isolating tensile forces, and eliminating insertion loss by maintaining continuous fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heat-shrink tubing and epoxy are used to furcate the trunkline, then the optic fibers are rigidly bound and structurally secured, but the optic fibers are damaged due to direct transmission of tensile forces
Solution Approach 1:
The invention divides the force-bearing function from the fiber-conduction function by segmenting the cable structure into separate components: strength filaments (Kevlar yarns) bear tensile forces while optic fibers remain isolated and protected from mechanical stress
Solution Approach 2:
The invention introduces an intermediary mechanism where the cable jacket and strength filaments act as mediators to absorb and bear tensile forces, preventing direct force transmission to the optic fibers through the furcation unit
2Ease of operation
If insertion-type connectors are used to furcate the trunkline, then connection flexibility is improved, but transmission loss increases significantly
Solution Approach 1:
The invention maintains continuous optic fibers from the trunkline through the furcation unit to the individual cables without any splices or connectors, ensuring uninterrupted light transmission and eliminating insertion loss while preserving connection flexibility
3Quantity of substance
If multiple furcation tubes are placed inside heat-shrink tubing, then more individual cables can be accommodated, but the space required increases and installation becomes difficult
Solution Approach 1:
The invention transitions from a confined internal arrangement (tubes inside heat-shrink) to an external organized array structure where furcation tubes are systematically arranged in channels on the furcation unit housing, facilitating easier installation and maintenance while accommodating multiple tubes
Data Source
AI summary
A fiber optic cable assembly is provided. The cable assembly includes a housing, a plurality of furcation tubes, and a bundled cable. The housing has an opening at a first end and a plurality of channels at a second end. The furcation tubes are aligned with corresponding channels. One end of the bundled cable extends into an interior space of the housing through the opening. The bundled cable has a cable jacket and cable filaments. A first portion of the cable filaments extends beyond the end of the cable jacket in the interior space. A plurality of optic fibers is disposed in the bundled cable and the housing, and a molding compound is disposed around the furcation unit. Individual optic fibers are in individual furcation tubes and movable to slide longitudinally relative to the housing.