Fiber Optic Deployment Assembly for Narrow-Duct Multi-Fiber Pulling
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Solution Overview
Problem
Conventional optical fiber LC connectors are not designed to minimize cross-sectional footprint, making it difficult to push multiple preterminated fibers through a duct simultaneously, especially for single mode optical fibers which require precise mechanical tolerances and skilled technicians for field termination.
Innovation Solution
A deployment assembly comprising a sleeve, rod, and dust caps is used to couple preterminated fiber optic cables, allowing them to be pushed, pulled, or blown through a duct with a smaller cross-sectional footprint than conventional connectors, using a PTFE protective sleeve to reduce friction and facilitate easy deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If conventional LC connectors are used for multi-fiber cables, then connector functionality is achieved, but cross-sectional footprint is too large to push through ducts
Solution Approach 1:
The connector is divided into two separate components: a deployment assembly with a small footprint for pushing through the duct, and a separate housing that is assembled at the destination. This segmentation allows the moving portion to have minimal cross-sectional area while maintaining full connector functionality after assembly.
Solution Approach 2:
The deployment assembly is prepared in advance with all necessary components (rod, dust caps, ferrules) configured for easy identification and assembly. The preterminated fibers are organized and protected before deployment, enabling quick assembly at the destination without complex field termination procedures.
2Productivity
If multiple preterminated fibers are pushed through duct simultaneously, then deployment time is reduced, but mechanical tolerances for single mode fiber make field termination difficult
Solution Approach 1:
All precision termination work is completed in the factory where controlled conditions ensure proper mechanical tolerances. The fibers are preterminated with connectors before deployment, eliminating the need for skilled field technicians to perform precision splicing or termination work after the fibers are installed.
Solution Approach 2:
The termination process is separated from the deployment process. Factory-preterminated connectors are deployed as complete units, allowing high-speed installation without requiring field technicians to perform precision mechanical work. The deployment assembly protects the preterminated connectors during installation.
3Area of moving object
If deployment assembly has minimal cross-sectional footprint, then fibers can be pushed through narrow ducts, but assembly complexity must be reduced
Solution Approach 1:
The deployment assembly uses a simple segmented structure with discrete components (rod, dust caps, ferrules) that can be easily assembled and disassembled. Each component has a single function, reducing overall complexity while maintaining minimal footprint during deployment.
Solution Approach 2:
Complex housing and mounting structures are extracted from the deployment assembly and placed in the separate permanent connector housing. The deployment assembly retains only the essential elements needed for pushing through the duct and facilitating assembly, minimizing its structural complexity.
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
Enables easy and smooth deployment of multiple preterminated fiber optic cables through ducts with reduced mechanical complexity and time, allowing field assembly of LC connectors post-deployment, thereby simplifying the installation process.
Implementation Method 1
using a PTFE protective sleeve to reduce friction and facilitate easy deployment
Data Source
AI summary
An assembly for pulling, pushing, or blowing a plurality of preterminated fiber optic cables of a multi fiber cable through a duct includes a receiving portion, an extension portion configured to be coupled with the receiving portion, and a plurality of dust caps. The receiving portion is configured to receive to be coupled with a multi fiber cable and to permit a plurality of preterminated fiber optic cables of the multi fiber cable to pass through the receiving portion, and the extension portion includes a first end configured to be coupled with the receiving portion. Each of the plurality of dust caps is configured to be coupled with a ferrule of one of the preterminated fiber optic cables, and each of the plurality of dust caps is configured to be coupled with the extension portion, thereby coupling the preterminated fiber optic cables with the extension portion. The preterminated fiber optic cables are configured to be assembled with a fiber optic connector, the deployment assembly has a cross-sectional footprint that is smaller than a cross-sectional footprint of a fiber optic connector that is configured to be assembled with the preterminated fiber optic cable, and the plurality of preterminated fiber optic cables are configured to be pushed, pulled, or blown together through a duct having an inner diameter than is less than a cross-sectional footprint of a fiber optic connector that is configured to be assembled with the preterminated fiber optic cable.