Optical Fiber Water-Blocking Polymer Coating
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Solution Overview
Problem
Optical fiber cables face water penetration issues in outdoor and intersection environments, leading to damage and reduced transmission performance, and existing solutions require additional protective layers that increase the cable diameter, which is undesirable in space-constrained network ducts.
Innovation Solution
Embedding water-blocking material in the outer surface of optical fibers or fiber ribbons within a polymer coating, eliminating the need for traditional water-blocking tapes and reducing the overall cable diameter by integrating the protection directly into the polymer layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional water-blocking tape layer is added to protect transmission media from water, then water protection is improved, but cable diameter increases
Solution Approach 1:
The patent combines the water-blocking function with the polymer coating layer by embedding water-blocking material directly into the polymer matrix. This merging of functions eliminates the need for separate water-blocking tape layers, thereby maintaining water protection while reducing cable diameter.
Solution Approach 2:
The patent uses composite materials by combining polymer and water-blocking material in a single integrated layer. The water-blocking material is embedded within the polymer coating, creating a composite structure that provides both mechanical protection and water blocking functions without requiring additional separate layers.
2Reliability
If extra protective layers are added around transmission media, then water protection is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple protective functions into a single integrated polymer coating layer that contains embedded water-blocking material. This eliminates the need for separate water-blocking tape layers and simplifies the overall cable structure while maintaining comprehensive protection.
Solution Approach 2:
The polymer coating layer is designed to perform multiple functions simultaneously: it provides mechanical protection, environmental protection, and water blocking through the embedded water-blocking material. This multi-functionality reduces the number of separate components needed in the cable structure.
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
Effectively prevents water penetration while minimizing the cable's overall diameter, enhancing the reliability of optical fiber cables in telecommunication networks by using superabsorbent polymers that absorb and retain large amounts of liquid, thus protecting the transmission media without adding extra layers.
Implementation Method 1
using superabsorbent polymers that absorb and retain large amounts of liquid
Implementation Method 2
water-blocking material is embedded in the outer surface of the polymer
Data Source
AI summary
Polymer-coated transmission media having water-blocking material embedded in the outer surface of the transmission media prevents water penetration into the transmission media and reduces the overall diameter of a cable made from the transmission media by eliminating a water-blocking tape layer in the cable. The outer surface of the transmission media is a polymer whose outer surface is embedded with a water-blocking material. The water-blocking material is applied before the polymer is cured. The transmission media may be any known type of optical media, which guides a light within the optical media. In various embodiments, optical fibers, buffered optical fibers and fiber ribbons are used as the transmission media.