Fiber Optic Cable Jacket With Embedded Access Features

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Solution Overview

Problem

Existing fiber optic cables lack efficient access mechanisms to the core, making maintenance and splicing difficult, and often require high forces to separate the jacket, which can damage the cable.

Innovation Solution

A fiber optic cable design featuring a tubular jacket with embedded access features made from a second polymeric material, allowing the jacket to be peeled apart from the core with a lower average peel force, enhancing coupling between the jacket and core while maintaining robustness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the jacket is made robust and tightly bonded to the core, then structural stability is improved, but access to the core becomes difficult requiring high separation forces

Engineering Contradiction:

Improvestructural stabilityVSAvoidaccess to core

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The jacket is segmented into two distinct material zones: a first polymeric material providing robust bonding to the core, and a second polymeric material forming access features that facilitate easy separation. This segmentation allows the jacket to simultaneously provide structural stability through strong bonding while enabling easy access through localized weak points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the jacket have different material properties: the bulk of the jacket uses a first polymeric material optimized for bonding strength and structural stability, while specific access features use a second polymeric material optimized for ease of separation. This local differentiation resolves the contradiction between needing strong bonding overall and needing easy access at specific points.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If the jacket is made from a single polymeric material, then manufacturing simplicity is maintained, but access features require high peel force that can damage the cable

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidcable damage during access

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The jacket is constructed as a composite structure with two different polymeric materials: a first polymeric material for the main jacket body providing structural integrity, and a second polymeric material for access features that requires lower peel force. This composite approach allows easy access without damaging the cable, as the second material is specifically designed to separate at lower forces while the first material maintains overall cable strength.

Inventive Principle:

Principle #40Composite materials

3Ease of operation

If access features are added to the jacket, then ease of access to core is improved, but jacket structure becomes more complex

Engineering Contradiction:

Improveaccess to coreVSAvoidjacket structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The access features are merged into the jacket structure through co-extrusion, where the second polymeric material is integrated directly into the first polymeric material during the extrusion process. This merging creates a unified jacket structure with embedded access features, avoiding the need for separate components or complex assembly steps, thus limiting the increase in device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The jacket serves multiple functions simultaneously: the first polymeric material provides structural support and bonding, while the second polymeric material provides access features. Both materials are integrated into a single extruded structure that performs both protective and access functions, reducing the need for additional separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 design provides fast and easy access to the core with reduced peel force requirements, improving maintenance efficiency and structural stability of the cable.

Implementation Method 1

The jacket includes access features formed from a second polymeric material at least partially embedded in the first polymeric material

Methodology Applied

Scientific EffectCo-extrusion: Extrusion

Implementation Method 2

The outermost surface of the core is at least partially bonded to the interior surface of the jacket, thereby enhancing coupling between the jacket and core

Methodology Applied

Scientific EffectBonding: Adhesive

Data Source

PatentUS8909014B2Fiber optic cable with access features and jacket-to-core coupling, and methods of making the same

Publication Date: 2014.12.09 CORNING OPTICAL COMMUNICATIONS LLC

AI summary

A fiber optic cable includes a cable jacket and a core. The cable jacket is tubular, having exterior and interior surfaces, and is formed mostly from a first polymeric material. The jacket includes access features formed from a second polymeric material at least partially embedded in the first polymeric material and extending lengthwise along the jacket. Two of the access features are spaced apart from one another with a section of the jacket formed from the first polymeric material extending laterally therebetween, such that the section may be peeled apart from the rest of the cable lengthwise along the jacket by separation of the jacket about the access features. The core has an outermost surface and includes optical fibers and a strength member. The outermost surface of the core is at least partially bonded to the interior surface of the jacket, which enhances coupling between the jacket and core.