Laser-Induced Marking on Optical Fiber Cable Jackets
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Solution Overview
Problem
Existing optical fiber cable identification methods, such as hot foil and ink jet printing, are inefficient and prone to damage, lacking the precision and durability needed for effective routing and maintenance in large distribution networks.
Innovation Solution
The use of a jacket with distinct polymer material marking regions that undergo laser-induced changes, such as foaming or delamination, to create durable and easily readable indicia, allowing for efficient identification and alignment of optical fiber cables during manufacturing and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot foil or ink jet printing is used for cable identification, then the marking process can be completed, but the indicia are prone to damage and lack durability
Solution Approach 1:
The patent replaces mechanical printing methods (hot foil, ink jet) with laser-induced marking. The laser creates permanent indicia by inducing physical changes in the polymer material, eliminating the need for consumable printing materials and providing durable, damage-resistant markings that are integral to the cable jacket itself.
Solution Approach 2:
The patent changes the physical parameters of the polymer material through laser exposure. By controlling laser power, pulse duration, and scanning speed, the system induces specific changes in the polymer (foaming, discoloration, or delamination) to create visible indicia that are permanently embedded in the cable structure.
2Measurement precision
If conventional printing methods are used, then cable marking can be performed, but alignment precision and readability are insufficient
Solution Approach 1:
The patent employs a vision system that automatically detects cable features and self-adjusts the laser positioning. The system captures images of the cable, identifies marking regions, calculates optimal laser positions, and dynamically adjusts the laser scan path without manual intervention, achieving high precision alignment while maintaining rapid processing speeds.
Solution Approach 2:
The patent implements a closed-loop feedback system where the vision system continuously monitors cable position and characteristics, and the controller adjusts laser parameters in real-time based on this feedback. This ensures precise indicia placement even when cable positioning varies, eliminating the need for slow manual alignment procedures.
3Reliability
If the cable jacket is made from a single polymer material, then manufacturing is simplified, but laser-induced indicia formation is limited
Solution Approach 1:
The patent applies local quality by creating marking regions with different polymer compositions than the bulk cable jacket. These localized regions contain polymers specifically selected for their laser response characteristics, allowing reliable indicia formation only where needed while maintaining the overall simplicity of the cable structure.
Solution Approach 2:
The patent uses composite material structures where the cable jacket incorporates distinct polymer regions. The marking regions contain polymers with specific properties (lower glass transition temperature, different thermal conductivity) that make them responsive to laser exposure, while the bulk jacket maintains its structural integrity and environmental resistance.
4Productivity
If existing marking methods are used, then cable identification is possible, but the process is inefficient and requires complex equipment alignment
Solution Approach 1:
The patent replaces complex mechanical alignment systems with a vision-guided laser system. Instead of using sophisticated print head positioning mechanisms, the system uses optical sensing to locate cable features and directs the laser accordingly, simplifying the mechanical requirements while improving marking efficiency and precision.
Solution Approach 2:
The patent introduces a vision system as an intermediary between the cable and the laser marking system. This intermediary captures visual information about cable position and characteristics, processes this data to determine optimal marking locations, and translates it into laser control commands, eliminating the need for direct mechanical alignment between the cable and laser source.
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
This solution enhances the efficiency of cable marking by providing durable, resistant, and easily editable indicia, reducing the complexity of aligning print heads and improving the overall installation and maintenance processes in optical fiber networks.
Implementation Method 1
The indicia are formed in at least one of the first marking region and the second marking region, and are formed from a laser-induced change to the second polymer material
Implementation Method 2
Indicia is formed from regions where the outer layer is separated from the inner layer
Implementation Method 3
The use of a jacket with distinct polymer material marking regions that undergo laser-induced changes, such as foaming or delamination, to create durable and easily readable indicia
Data Source
AI summary
An optical fiber carrying structure that includes a jacket is provided. The jacket includes a primary body portion formed from a first polymer material and a one or more marking region formed from a second polymer material. Indicia are formed in at least one of the marking regions. The indicia are formed from a laser-induced change to the second polymer material.