Variable Cross-Section Fiber Optic Cable for Reliable Coupling
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Solution Overview
Problem
Traditional fiber optic cable designs for distribution and drop links lack the necessary characteristics for efficient coupling and deployment, requiring complex installation procedures and often resulting in improper coupling, which limits bandwidth availability for subscribers.
Innovation Solution
Fiber optic cables with a cavity cross-sectional area that changes along their length, featuring a dry insert with varying thickness, providing tailored coupling by compressing the insert to maintain optical fiber position and prevent water migration, thus eliminating the need for special installation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional fiber optic cable designs are used, then the cable structure is simple, but the coupling characteristics are insufficient and require complex installation procedures
Solution Approach 1:
The cable jacket incorporates a variable cross-sectional cavity that provides different coupling characteristics at different locations along the cable length, eliminating the need for complex installation procedures while maintaining structural simplicity
Solution Approach 2:
The cavity cross-section varies dynamically along the cable length, creating regions of different coupling strength that adapt to different installation and operational requirements without requiring active control mechanisms
2Ease of operation
If cable coiling is used to provide coupling, then coupling is achieved, but extra cable length is required and node locations are interfered with
Solution Approach 1:
The variable cross-sectional cavity provides localized coupling characteristics within the cable structure itself, eliminating the need for cable coiling and associated length requirements
3Ease of operation
If installation procedures are used to achieve coupling characteristics, then coupling is provided, but reliability is reduced due to improper installation
Solution Approach 1:
The cable structure itself provides the coupling characteristics through its variable cross-sectional cavity, eliminating dependence on installer skill and ensuring consistent, reliable coupling without special installation procedures
4Object-affected harmful factors
If dry cable design is used, then water-blocking is improved, but coupling characteristics may be compromised
Solution Approach 1:
The variable cross-sectional cavity in the dry cable jacket provides localized coupling characteristics without requiring water-blocking grease or gel, achieving both water-blocking and proper coupling in a grease-free design
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables quick and easy deployment of fiber optic cables with reliable coupling and water-blocking capabilities, ensuring high-bandwidth capacity and robustness in outdoor environments without requiring complex installation procedures.
Implementation Method 1
providing tailored coupling by compressing the insert to maintain optical fiber position
Implementation Method 2
a dry insert with varying thickness, providing tailored coupling by compressing the insert
Data Source
AI summary
A fiber optic cable including at least one optical fiber disposed within a cavity of a cable jacket and methods for manufacturing the same are disclosed. The cavity has a first cavity cross-sectional area and a second cavity cross-sectional area located at different longitudinal locations along the cable, where the first cavity cross-sectional area is greater than the second cavity cross-sectional area. The region of the second cavity cross-sectional area of the cable provides and/or increases the coupling level of the at least one optical fiber to the cable jacket. In further embodiments, the fiber optic cable is a dry cable having one or more dry insert within the cavity for cushioning and/or optionally providing water-blocking for the cable.