Ferrule-Less Optical Connector Shutter and Adapter Alignment
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Solution Overview
Problem
Ferrule-less fiber optic connectors face challenges in maintaining effective fiber end protection and minimizing back reflection of optical signals, while existing adapters struggle with precise alignment and buckling control, leading to variability in light transfer efficiency.
Innovation Solution
The proposed solution involves a fiber optic connector with a shutter having a light distribution structure with angled facets and an adapter with offset fiber biasing members and a buckling controller, utilizing index matching gel and a specific fiber alignment groove design to reduce back reflection and control buckling, ensuring precise alignment and minimal optical loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If ferrule-less optical connectors are used to simplify structure and reduce cost, then manufacturing complexity is reduced, but fiber end protection and back reflection control become insufficient
Solution Approach 1:
The patent introduces index matching gel as an intermediary substance between the optical fiber end and the shutter surface. This gel serves multiple functions: it protects the fiber end from contamination while maintaining optical contact, reduces back reflection through index matching, and eliminates the need for complex ferrule structures. The gel acts as a mediator that resolves the contradiction between simple connector design and reliable fiber protection.
Solution Approach 2:
The patent changes the optical parameters at the fiber end interface by applying index matching gel with specific refractive index properties. This parameter change (optical index matching) reduces back reflection while maintaining physical protection, allowing the connector to achieve reliability without complex ferrule structures.
2Manufacturing precision
If conventional alignment structures are used in adapters, then alignment function is provided, but precise alignment and buckling control result in variability in light transfer efficiency
Solution Approach 1:
The patent incorporates feedback mechanisms in the alignment process where the adapter structure provides mechanical feedback through the biasing members that automatically adjust fiber position. The buckling controller provides feedback on fiber tension and position, enabling real-time adjustment to maintain consistent alignment and reduce variability in light transfer efficiency.
Solution Approach 2:
The patent introduces dynamic adjustment capabilities through movable biasing members and buckling controllers that can adapt to manufacturing tolerances and usage conditions. This dynamic system maintains precise alignment and consistent light transfer efficiency despite variations in assembly precision or environmental changes.
3Reliability
If shutters are used to protect fiber ends, then fiber protection is improved, but back reflection of optical signals increases due to direct shutter surface contact
Solution Approach 1:
The patent introduces index matching gel as an intermediary layer between the shutter and fiber end. This gel eliminates direct contact between the shutter surface and fiber, reducing back reflection through index matching while maintaining the protective function of the shutter. The gel layer acts as a optical mediator that resolves the harmful reflection effect.
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
This configuration enhances fiber end protection, reduces back reflection, and improves the tolerance in optical axis alignment, resulting in consistent and efficient light transfer with reduced variability in optical losses.
Implementation Method 1
Index matching gel is positioned within the interior receptacle of the shutter, the index matching gel covering at least a portion of the light distribution structure such that the free end portion of the optical fiber is embedded within the index matching gel
Data Source
AI summary
A system for connecting a fiber optic connector to a fiber optic adapter includes various alternative improvements, including improvements to the shutter, the alignment device, and the adapter in general.