Optical Fiber Array Cable with Bend-Limiting Retraction Mechanism
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Solution Overview
Problem
Current fiber optic cable manufacturing techniques face limitations in flexibility, production throughput, and yield due to stranding of optical fibers and aramid yarns, which result in high optical attenuation at small-radius bends and manufacturing inefficiencies.
Innovation Solution
The development of a fiber optic array cable with a polymer jacket and tube structure, incorporating retractable tether assemblies with a bend-limiting retraction mechanism and copper-clad spring steel strength/anti-flexion members, allowing for flexible placement of optical devices and reducing optical attenuation by minimizing small-radius bends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical fibers and aramid yarns are stranded in conventional cable structures, then cable flexibility and installation adaptability are improved, but small-radius bends cause high optical attenuation and manufacturing complexity increases
Solution Approach 1:
The cable is divided into multiple independent fiber channels, each surrounded by its own buffer tube. This segmentation allows each fiber to be independently protected and positioned, preventing the harmful effects of stranding while maintaining cable flexibility through the overall cable structure design.
Solution Approach 2:
Buffer tubes serve as intermediary elements between the optical fibers and the external environment. These tubes protect the fibers from bending stresses and mechanical damage, allowing the cable to be flexible without causing small-radius bends that would attenuate the optical signal.
2Adaptability or versatility
If optical fibers are stranded to improve cable flexibility, then installation adaptability increases, but manufacturing precision and production throughput decrease
Solution Approach 1:
The manufacturing process is segmented into independent steps for each buffer tube and fiber channel. This allows for precise control and quality assurance of each individual fiber assembly before final cable construction, significantly improving manufacturing precision and reducing defects.
Solution Approach 2:
Fibers are pre-assembled into buffer tubes with precise positioning and protection before being integrated into the final cable structure. This preliminary organization ensures that fibers are correctly positioned and protected from damage during subsequent manufacturing and installation processes.
3Adaptability or versatility
If conventional stranding techniques are used to achieve cable flexibility, then cable adaptability improves, but production throughput and manufacturing efficiency are reduced
Solution Approach 1:
The cable construction process is divided into independent modular units (buffer tubes containing fibers). These modules can be manufactured, tested, and prepared separately, then quickly assembled into the final cable. This modular approach dramatically increases production throughput while maintaining cable flexibility.
Solution Approach 2:
The cable structure transitions from traditional stranding parameters to a modular buffer-tube arrangement. This parameter change allows for standardized manufacturing processes and automated assembly, significantly improving production efficiency while achieving the required cable flexibility through the modular design.
Data Source
AI summary
An optical system that allows for the flexible location of an optical device that is coupled to a patch panel in a wiring closet or other optical signal source through a series of fiber optic cables and optical connections, or the flexible location of an array of such optical devices. Array cables have optical and electrical conductors to provide electrical power as well as optical data in optical systems.