Optical Fiber Ribbon Resin With Oxide Fillers for Low-Loss Bending
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Solution Overview
Problem
Existing optical fiber ribbons face challenges in improving lateral pressure characteristics without increasing transmission loss, as enhancing the Young's modulus through resin formulation adjustments can lead to curing strain and increased transmission loss.
Innovation Solution
Incorporating hydrophobic inorganic oxide particles, such as silicon dioxide, into the ribbon resin composition, which includes a base resin, oligomers, and a photopolymerization initiator, to enhance modulus while maintaining low curing strain and reducing adhesion, thereby improving lateral pressure characteristics and suppressing transmission loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the Young's modulus is increased by adjusting oligomer molecular weight and formulation proportions, then lateral pressure characteristics are improved, but curing strain increases and transmission loss increases
Solution Approach 1:
The patent changes the chemical composition parameters of the batch coating layer by incorporating specific ratios of cyclic carbonate monomers (30-70 mass%) and cyclic carboxylate monomers (30-70 mass%), along with controlling oligomer molecular weight (1,000-10,000). This parameter optimization achieves the desired Young's modulus while controlling curing strain to prevent transmission loss increase.
Solution Approach 2:
The patent creates a composite resin system combining cyclic carbonate monomers, cyclic carboxylate monomers, and oligomers with molecular weights of 1,000-10,000. This composite formulation achieves synergistic effects where the combination of components provides both the required mechanical strength (Young's modulus of 0.5-2.0 GPa) and controlled curing characteristics to minimize transmission loss.
2Strength
If the Young's modulus is increased to improve lateral pressure characteristics, then handling and bend performance are improved, but curing strain is applied to the optical fiber
Solution Approach 1:
The patent optimizes the molecular weight parameter of oligomers to 1,000-10,000 and controls the monomer composition ratios to achieve a Young's modulus of 0.5-2.0 GPa while keeping curing strain within acceptable limits. This parameter range prevents excessive strain application during the curing process.
Solution Approach 2:
The patent introduces local flexibility through the selection of specific cyclic carbonate and cyclic carboxylate monomers that provide localized chain mobility within the resin matrix. This allows the material to have high overall Young's modulus while maintaining local compliance that reduces stress concentration and curing strain on the optical fiber.
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 optical fiber ribbon achieves improved lateral pressure characteristics and reduced transmission loss, allowing for sharper bends and better handling during cable formation, with the inorganic oxide particles providing excellent dispersibility and surface hardness.
Implementation Method 1
the ribbon resin is a cured product of a resin composition including a base resin containing oligomers, monomers and a photopolymerization initiator
Implementation Method 2
The inorganic oxide particles are hydrophobic and a UV curable reactive group is introduced as a hydrophobic group into a surface of the inorganic oxide particles
Data Source
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AI summary
The present disclosure relates to an optical fiber ribbon in which a plurality of optical fibers are covered with a ribbon resin, wherein the ribbon resin is a cured product of a resin composition including a base resin containing oligomers, monomers and a photopolymerization initiator, and inorganic oxide particles.