Optical Fiber Air Layer Core Bridge Structure
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Solution Overview
Problem
Optical fibers made of quartz glass face challenges in reducing loss components at the core-clad interface and scattering losses, due to the material's inherent properties and complex fiber structures.
Innovation Solution
The optical fiber features an air layer between the core and the cladding, with the core supported by bridges, allowing for a simpler structure that minimizes loss components and scattering losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If quartz glass is used as the base material for optical fiber, then the fiber can maintain structural integrity and transmission capability, but loss components are generated at the core-clad interface and in the clad region that cannot be completely removed
Solution Approach 1:
The patent extracts the harmful interface by introducing an air layer between the core and cladding, completely separating the core-clad interface from the electric field distribution. The air layer acts as a barrier that prevents the electric field from interacting with the cladding material, thereby eliminating the loss components that would otherwise be generated at the core-clad interface.
Solution Approach 2:
The air layer serves as an intermediary element between the core and cladding. It mediates the interaction between the core electric field and the cladding by providing a low-permittivity barrier that prevents direct coupling, thus reducing the harmful loss components while maintaining the overall fiber structure.
2Loss of energy
If a hollow core structure is used to reduce material loss, then loss from quartz glass characteristics is reduced, but scattering loss occurs at the interface with the clad region and the fiber structure becomes complex requiring precision control in manufacturing
Solution Approach 1:
The patent segments the fiber structure into distinct functional regions: a core region for light propagation, an air layer region for field confinement, and a cladding region for structural support. This segmentation allows each region to be optimized independently, simplifying the overall structure while reducing scattering losses at interfaces.
Solution Approach 2:
The patent applies local quality by creating a specific air layer region with different permittivity properties compared to the core and cladding. This local modification with distinct material properties enables reduced scattering losses at the core-clad interface while maintaining structural integrity, without requiring complex overall fiber structure.
3Loss of energy
If a hollow core structure is used to reduce material loss, then loss from quartz glass characteristics is reduced, but scattering loss occurs at the interface with the clad region
Solution Approach 1:
The patent extracts the harmful interface by introducing an air layer between the core and cladding, completely separating the core-clad interface from the electric field distribution. The air layer acts as a barrier that prevents the electric field from interacting with the cladding material, thereby eliminating the loss components that would otherwise be generated at the core-clad interface.
Solution Approach 2:
The air layer serves as an intermediary element between the core and cladding. It mediates the interaction between the core electric field and the cladding by providing a low-permittivity barrier that prevents direct coupling, thus reducing the harmful loss components while maintaining the overall fiber structure.
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 effectively confines the electric field distribution within the core, reducing loss components and scattering losses, thereby achieving lower transmission losses compared to conventional optical fibers.
Implementation Method 1
an air layer is provided between a core and a cladding... can have a simple structure, as well as attain removal of loss components generated in an electric field part oozing out to a core-clad interface or a clad region
Implementation Method 2
two or more bridges for supporting the core in the air layer
Implementation Method 3
a refractive index of the cladding is lower than a refractive index of the core... given that the number of propagation modes is (n+1), the refractive index of the cladding is lower than an effective refractive index of an n-th order mode and higher than an effective refractive index of an (n+1)-th order mode
Data Source
AI summary
An object of the present disclosure is to provide an optical fiber having a simple structure, as well as attaining removal of loss components generated in an electric field part oozing out to a core-clad interface or a clad region and reduction in scattering loss generated from an interface with the clad region.The present disclosure relates to an optical fiber including a core for propagating light, a cladding disposed around the core, an air layer between the core and the cladding, and two or more bridges for supporting the core in the air layer.