Lensed Fiber Connector Dust Insensitive Alignment
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Solution Overview
Problem
Lensed optical fiber connectors are sensitive to dust and debris, which can cause angular misalignment and increased coupling losses due to trapped particles during ferrule mating.
Innovation Solution
The ferrule end faces have reduced contact areas, with specific surface configurations such as raised surfaces, contact rings, and gaskets to minimize the impact of trapped dust and debris, ensuring accurate alignment and low loss transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large flat contact surfaces are used for ferrule mating, then alignment precision is improved, but dust sensitivity increases due to higher probability of trapped particles
Solution Approach 1:
The contact surface is segmented into multiple discrete contact points or contact regions rather than a continuous large flat surface. This segmentation reduces the total area where dust particles can be trapped while maintaining sufficient contact for alignment, directly resolving the contradiction between alignment precision and dust sensitivity
Solution Approach 2:
Different regions of the ferrule end face are given different properties: small localized contact areas provide alignment function while larger non-contact regions reduce dust trapping probability. The contact surfaces are strategically positioned to optimize alignment without requiring large continuous contact areas
2Object-affected harmful factors
If contact surface area is reduced to minimize dust impact, then dust sensitivity is reduced, but alignment precision may deteriorate
Solution Approach 1:
The contact interface is divided into multiple discrete contact points that are optimally positioned and sized. This segmentation allows the total contact area to be reduced for dust sensitivity while the strategic distribution of contact points maintains alignment precision through geometric constraints
Solution Approach 2:
Alignment precision is achieved not solely through contact surface area in two dimensions, but by incorporating vertical dimension elements such as raised contact surfaces or stepped features that provide mechanical alignment constraints with minimal contact area
Data Source
AI summary
The present disclosure relates to lensed optical fiber connector ferrule end faces having molded contact surfaces. The contact surfaces reduce ferrule end face contact area and thereby reduce the influence of trapped dust and debris on lens angular misalignment.