Optical Fiber Marking via Drop-on-Demand Printing
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Solution Overview
Problem
Existing methods for applying tracer markings to optical fibers are limited by line speed, often resulting in poor tracer marking quality and increased signal loss due to micro-bending effects, especially at high draw speeds typical in optical fiber manufacturing.
Innovation Solution
The implementation of a drop on demand printing technology for applying a tracer marking fluid to the curable coating composition or coating of optical fibers during the draw process, allowing for tracer marking application at higher line speeds without compromising quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional marking methods are used at high draw speeds, then productivity is improved, but tracer marking quality deteriorates
Solution Approach 1:
The patent replaces traditional mechanical marking systems with a drop-on-demand printing system that uses controlled liquid droplet deposition. This substitution enables precise tracer marking at high draw speeds by eliminating the mechanical limitations of conventional marking methods while maintaining marking quality through controlled droplet placement and curing.
2Productivity
If tracer marking is applied at high line speeds, then process efficiency is improved, but signal loss due to micro-bending increases
Solution Approach 1:
The patent changes the physical parameters of the marking process by using drop-on-demand technology to deposit tracer marking fluid at controlled rates. This parameter change allows the marking process to operate at high line speeds compatible with modern draw processes while preventing micro-bending effects that cause signal loss, thereby maintaining both efficiency and reliability.
3Device complexity
If conventional marking systems are used, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The patent replaces complex mechanical marking systems with a drop-on-demand printing system that uses controlled liquid droplet deposition. This substitution achieves superior manufacturing precision through controlled droplet placement while managing device complexity through the use of established printing technology adapted for fiber marking applications.
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 the efficient application of tracer markings at line speeds compatible with optical fiber draw processes, maintaining tracer mark quality and integrity, and improving overall process efficiency.
Implementation Method 1
a first lighting device configured to receive the glass fiber from the first coating system and to apply first light to the first curable coating composition, the first light curing the first curable coating composition to form a first coating on the glass fiber
Implementation Method 2
a marking device operably coupled to the first coating system of the first lighting device, the marking device configured to apply a tracer marking fluid to the first curable coating composition or the first cured coating layer
Data Source
AI summary
An optical fiber draw system that prints one or more fiber identifiers on optical fibers is described. In one example, the optical fiber draw system includes a draw furnace, a coating device, a marking device, and a lighting device. The draw furnace generates a glass fiber from a glass preform and the coating device is configured to apply a curable coating composition to the glass fiber. The lighting device applies an ultraviolet or other curing light to form a coating from the curable coating composition. The application and curing of a curable coating composition can be completed one or more times to form one or more coatings on the glass fiber. The marking device applies a tracer marking fluid to a curable coating composition or coating and can be placed at one or more positions along the process pathway.