Optical Connector Refractive Index Gradient via Photopolymerization
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Solution Overview
Problem
Existing optical connector systems require precise alignment and additional manufacturing steps, such as polishing and cladding, to enhance electromagnetic wave propagation efficiency, which increases complexity and cost.
Innovation Solution
A method for preparing optical connectors with a contrast layer having cured bridge portions and intermixed portions, where the refractive index is optimized by applying different compositions, reducing the need for precise alignment and polishing, and improving wave propagation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If self written polymerization of polymer bridges is used to create optical connectors, then precision alignment is not required, but electromagnetic wave propagation efficiency is poor due to single refractive index material
Solution Approach 1:
The patent applies composite materials by combining two different polymer compositions with different refractive indices. The first composition (higher refractive index) forms the bridge portion, while the second composition (lower refractive index) forms the cladding layer. This composite structure enables total internal reflection for efficient electromagnetic wave propagation while maintaining the self-aligned fabrication advantage.
Solution Approach 2:
The patent implements local quality by creating spatial variation in refractive index within the optical connector. The bridge portion has a higher refractive index to guide light, while the cladding layer has a lower refractive index to confine light through total internal reflection. This localized differentiation of material properties optimizes electromagnetic wave propagation efficiency.
2Loss of energy
If cladding material is introduced around self written polymer bridge to increase electromagnetic wave propagation efficiency, then propagation efficiency improves, but manufacturing time and cost increase
Solution Approach 1:
The patent merges the bridge formation and cladding application into a single fabrication step. Both the first composition (bridge) and second composition (cladding) are applied simultaneously to the substrate, and cured together in one photopolymerization process. This eliminates separate manufacturing steps for bridge creation and cladding application, reducing manufacturing time while achieving efficient electromagnetic wave propagation.
3Manufacturing precision
If traditional optical connector methods with precision alignment, gluing, and polishing are used, then connection precision is high, but manufacturing complexity and cost increase
Solution Approach 1:
The patent employs self-service through self-aligned photopolymerization. The photopolymerizable composition automatically forms bridges between adjacent optical waveguides through light-induced polymerization, eliminating the need for external alignment mechanisms, precision positioning systems, or manual adjustment procedures. The process is self-directed by the optical field distribution, achieving high connection precision with minimal equipment complexity.
Solution Approach 2:
The patent replaces mechanical alignment and physical assembly operations with photopolymerization chemistry. Instead of using mechanical positioning systems, gluing processes, and polishing equipment, the invention uses light-induced chemical reactions to directly form functional optical connections. This substitution eliminates complex mechanical systems while achieving precise and reproducible connector formation.
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 method simplifies the manufacturing process, reduces alignment requirements, and enhances electromagnetic wave propagation by conforming the interface to the terminal ends of optical elements, minimizing losses and eliminating the need for cladding, thus improving efficiency and reproducibility.
Implementation Method 1
applying a first curing condition to cure the first composition to form a contrast layer including at least one cured bridge portion
Implementation Method 2
applying a second curing condition to cure the second composition to form a cured cladding layer
Implementation Method 3
the cured cladding layer guides electromagnetic waves between the at least one optical element of the first optical assembly and the at least one optical element of the second optical assembly
Data Source
AI summary
A method of preparing an optical connector located within a gap between a first optical assembly and a second optical assembly is provided. The optical connector includes a contrast layer having at least one cured bridge portion and at least one uncured portion formed from a first composition having a first refractive index (RI1). The method comprises applying a second composition having a second refractive index (RI2) on the contrast layer to form a second layer and mixing at least a portion of the second layer with the at least one uncured portion of the contrast layer to form at least one intermixed portion having a third refractive index (RI3), wherein R|1>R|3>RI2, and then curing the intermixed portion and optional second layer such that each one of the at least one cured bridge portions is surrounded by an intermixed portion and optional second layer.