Optical Fiber Hybrid Cladding for Clean Stripping
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Solution Overview
Problem
Optical fibers used in short data networks face challenges due to fatigue from internal stresses in confined or bent configurations, and existing hybrid claddings are not compatible with conventional stripping processes, leading to damage or residue issues during coating removal.
Innovation Solution
The development of optical fibers with a hybrid cladding formed by curing a composition including a monomer, oligomer, photoinitiator, and slip component, which provides high thermal stability, controlled adhesion for clean stripping, and enhanced fatigue resistance, allowing the hybrid cladding to maintain integrity and prevent residue during thermal stripping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inner coating layer (hybrid cladding) is added to improve fatigue resistance, then fatigue resistance is improved, but the complexity of the fiber structure increases and compatibility with standard thermal stripping processes deteriorates
Solution Approach 1:
The patent applies composite materials by creating a hybrid cladding that combines organic polymer materials with specific functional properties. The hybrid cladding comprises a polymer matrix with controlled adhesion characteristics, combining the benefits of fatigue resistance with compatibility for clean stripping. This composite approach allows the integration of multiple functions (protection and removable adhesion) within a single layered structure.
2Strength
If the hybrid cladding is made highly adhesive to ensure fiber integrity, then fiber strength is improved, but clean stripping during thermal processing becomes difficult and residue remains
Solution Approach 1:
The patent applies local quality by creating distinct adhesion characteristics at different interfaces of the hybrid cladding. The outer surface of the hybrid cladding is designed with controlled adhesion to the primary coating, allowing clean separation during stripping. This localized adhesion control ensures that the hybrid cladding maintains strong bonding where needed while enabling clean release at the coating interface during thermal processing.
3Productivity
If standard thermal stripping temperatures (150-200°C) are used, then coating removal is efficient, but the hybrid cladding may be damaged or degraded
Solution Approach 1:
The patent applies parameter changes by selecting polymer materials for the hybrid cladding with specific thermal properties, including glass transition temperatures and decomposition points that exceed the standard thermal stripping range of 150-200°C. This parameter selection ensures that the hybrid cladding remains thermally stable and structurally intact during the stripping process, while still allowing controlled adhesion changes for clean coating removal.
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 solution enables optical fibers to withstand high stress configurations while ensuring clean stripping of primary and secondary coatings, maintaining the hybrid cladding's integrity and preventing residue, thus enhancing the reliability and performance of optical fibers in short data networks.
Implementation Method 1
The hybrid cladding may be formed by curing a composition that may include a monomer, an oligomer, a photoinitiator, and a slip component
Data Source
AI summary
A hybrid cladding for optical fibers used in short data networks. The hybrid cladding surrounds a glass waveguide fiber and is surrounded by a primary coating. The hybrid cladding has low adhesion to the primary coating. The low adhesion permits stripping of the primary coating from the hybrid cladding without damaging the hybrid cladding and without leaving residue of the primary coating on the surface of the hybrid cladding. The hybrid cladding may be formed by curing a composition that includes a monomer with a radiation-curable functional group, a slip component, and a photoinitiator. The radiation-curable functional group may be a (meth)acrylate group. The slip component may contain silicon or silicone and may further contain a radiation-curable functional group. Silicone di(meth)acrylate is an illustrative slip component.