Light Diffusing Optical Fiber Bundles with Nano-Void Glass Cores
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Solution Overview
Problem
Existing light diffusing optical fiber bundles struggle to efficiently harvest light from Lambertian radiation sources due to inefficiencies in light distribution and flexibility, particularly when coupled with polymer optical fibers.
Innovation Solution
A light diffusing optical fiber bundle with a non-interwoven arrangement of glass core fibers containing nano-sized voids within an optically transmissive jacket, allowing for enhanced flexibility and improved light scattering, coupled with a method of affixing these bundles to polymer optical fibers by softening the insertion end and inserting the fiber bundle, thereby enhancing light emission and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If light diffusing optical fiber bundles use traditional interwoven arrangements, then structural strength is improved, but flexibility and light scattering efficiency deteriorate
Solution Approach 1:
The optical fiber bundle is segmented into individual parallel fibers rather than interwoven strands, allowing each fiber to independently scatter light while maintaining bundle flexibility. The jacket encases separate fibers that can move relative to each other, improving overall bundle flexibility without compromising structural integrity.
Solution Approach 2:
An optically transmissive jacket encases the parallel optical fibers, providing structural strength and protection while allowing the bundle to bend and flex. The jacket acts as a flexible shell that maintains fiber alignment during bending, enabling the bundle to adapt to different configurations without fiber damage.
2Stability of the object's composition
If light diffusing optical fiber bundles use traditional interwoven arrangements, then structural stability is improved, but light harvesting efficiency from Lambertian sources deteriorates
Solution Approach 1:
The bundle consists of discrete parallel fibers rather than interwoven strands, creating multiple independent light entry points that efficiently capture Lambertian radiation from all angles. Each fiber independently harvests light, increasing overall light collection efficiency while maintaining structural stability through the jacket.
Solution Approach 2:
The optical fibers are arranged in a parallel configuration that optimizes light harvesting in the lateral dimension, allowing efficient capture of divergent Lambertian light. This parallel arrangement creates a two-dimensional light collection surface that is more effective than traditional interwoven structures for omnidirectional light sources.
3Illumination intensity
If optical fibers are made with glass cores containing nano-sized voids, then light scattering capability is improved, but manufacturing complexity increases
Solution Approach 1:
The glass core of each optical fiber contains nano-sized voids distributed throughout its structure, creating a porous material that scatters light effectively. This porous structure is formed during fiber manufacturing by incorporating nanopores into the glass matrix, providing enhanced light diffusion without requiring complex post-processing.
Solution Approach 2:
The glass core material parameters are modified by introducing nano-sized voids with specific size distributions (typically 50-500 nm), changing the refractive index and scattering properties. This parameter change is achieved through controlled manufacturing processes that create the desired nanopore structure during fiber formation.
4Strength
If polymer optical fibers are rigid, then structural strength is improved, but coupling efficiency with flexible fiber bundles deteriorates
Solution Approach 1:
The polymer optical fiber is softened by heating to a temperature above its glass transition or melting point, changing its physical state from rigid to pliable. This temporary parameter change allows the fiber to be inserted into and coupled with the flexible fiber bundle, after which cooling restores its structural strength.
Solution Approach 2:
The polymer optical fiber undergoes a phase transition from solid rigid state to softened pliable state through heating, enabling easy coupling with the fiber bundle. After insertion and coupling, the fiber cools and returns to its original rigid phase, maintaining structural integrity while achieving efficient optical coupling.
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 solution enables more efficient light harvesting and distribution, increased flexibility of the optical fiber bundles, and improved coupling efficiency with light sources, allowing for effective illumination systems.
Implementation Method 1
light propagating through the light diffusing optical fiber is scattered radially outward along a length of the fiber
Implementation Method 2
an optically transmissive jacket and a plurality of light diffusing optical fibers disposed within the optically transmissive jacket
Data Source
AI summary
Light diffusing optical fiber bundles, illumination systems including light diffusing optical fiber bundles, and methods of affixing light diffusing optical fiber bundles to polymer optical fibers are disclosed. A light diffusing optical fiber bundle includes an optically transmissive jacket and a plurality of light diffusing optical fibers disposed within the optically transmissive jacket. Each of the plurality of light diffusing optical fibers includes a glass core including a plurality of nano-sized voids. The plurality of light diffusing optical fibers extend along a length of the optically transmissive jacket such that the plurality of diffusing optical fibers are not interwoven.