Integrally Formed Waveguide Adapter for Fiber Coupling
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Solution Overview
Problem
Coupling light between standard single core fibers and multicore fibers with a two-dimensional array of cores is challenging due to the complexity of core geometries, and existing methods are limited by the use of fragile fibers, toxic substances, and the need for precisely shaped capillaries or tapers.
Innovation Solution
An optical adapter with integrally formed waveguides, created using laser technology, that can connect different connector layouts by defining a 1D connector array at one end and a 2D array at the other, allowing for flexible and rugged coupling of light between various optical devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard methods (tapered fibers, etched fibers, fusion splicing) are used to couple light between single core fibers and multicore fibers, then coupling can be achieved, but the device becomes fragile and manufacturing is complex
Solution Approach 1:
The patent introduces an adapter as an intermediary component that couples light between single core fibers and multicore fibers. The adapter contains multiple waveguides formed within a single piece of material, serving as a mediator that eliminates the need for fragile tapered or etched fiber configurations while providing a robust, integrated coupling solution.
Solution Approach 2:
The patent merges multiple waveguides into a single integrated adapter component. Instead of using separate fragile fiber elements that require precise alignment and handling, the waveguides are combined within one monolithic piece of material, significantly improving reliability and simplifying manufacturing.
2Adaptability or versatility
If hollow capillaries are used to position fibers for MCF coupling, then direct coupling is achieved, but the device fabrication is limited to specific geometries
Solution Approach 1:
The patent transitions from two-dimensional fiber positioning within hollow capillaries to three-dimensional waveguide routing within a solid adapter material. This dimensional change allows waveguides to be formed in complex spatial configurations that can accommodate various MCF core geometries without being constrained by capillary shapes, thereby improving adaptability while simplifying fabrication.
Solution Approach 2:
The patent changes the fundamental parameter of the coupling medium from hollow capillary structures to solid material with embedded waveguides. This parameter change enables greater fabrication flexibility because waveguides can be formed using standard manufacturing techniques within a solid substrate, removing the geometric constraints imposed by hollow capillary fabrication.
3Manufacturing precision
If fibers are etched with hydrofluoric acid to create coupling devices, then coupling geometry can be adjusted, but toxic substances are used and fibers become extremely fragile
Solution Approach 1:
The patent replaces the harmful etching process with an intermediary approach where waveguides are formed within a separate adapter material. This eliminates direct chemical treatment of fibers, removing toxicity concerns and preventing fiber fragility while still achieving precise geometric matching through controlled waveguide fabrication within the adapter.
Solution Approach 2:
The patent replaces expensive, fragile etched fibers with a more robust adapter component that can be manufactured using less hazardous methods. The adapter serves as a disposable or replaceable element that protects the valuable MCF from damage while achieving the required coupling precision.
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 adapter provides a reliable and efficient means to couple light between complex multicore fibers and standard fibers, offering low loss and flexibility in design, suitable for various applications including high power or pulsed laser systems, and can be fabricated using materials like silica glass with optimized refractive index variations.
Implementation Method 1
using a laser to define a plurality of waveguides in an optical material
Implementation Method 2
the waveguides being formed within the material of the adapter itself... with optimized refractive index variations
Data Source
Figure 1(a)~1(c)
Figure 2
Figure 3~5
AI summary
An optical adapter that is arranged to connect two or more optical devices that have different connector layouts, the optical adapter comprising a material through which a plurality of waveguides is formed, the waveguides defining a first connector configuration at one end or face of the material and a second connector configuration at another, or same end or face of the material.