Polymer Waveguide Amplification Switch for Optical PCBs
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Solution Overview
Problem
Existing optical waveguides face significant optical losses and inefficiencies due to the need for long active regions in silica fibers for effective amplification, which limits their practical deployment on optical printed circuit boards for tasks like switching, mode conversion, and multiplexing.
Innovation Solution
Polymer waveguides doped with amplifying dopants, such as organo-lanthanide complexes, are used with optical pump sources to create active regions that amplify signals, allowing for efficient switching, mode conversion, and multiplexing by controlling light transmission through varying the waveguide's cross-sectional area and numerical aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If silica fibers with long active regions are used for amplification, then signal amplification is achieved, but optical losses increase and device complexity increases
Solution Approach 1:
The patent changes the material parameter from silica fiber to polymer waveguide material, and modifies the doping concentration parameter to achieve higher doping concentrations (10^-3 to 10^-1 molar concentration), enabling effective amplification in shorter regions while reducing optical losses
Solution Approach 2:
The patent uses composite materials by doping polymer waveguides with amplifying dopants such as organo-lanthanide complexes, creating a composite structure that combines the advantages of polymer flexibility with the amplification properties of rare earth dopants, achieving efficient signal amplification without requiring long active regions
2Reliability
If long active regions are used in silica fibers, then amplification is achieved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the waveguide material from silica to polymer and increases doping concentration, which reduces the required active region length and simplifies the overall device structure while maintaining or improving signal transmission reliability through efficient amplification
Solution Approach 2:
The patent applies local quality by creating doped regions with specific amplification properties at particular locations within the polymer waveguide, allowing switching and amplification functions to be achieved in localized segments rather than requiring complex structures throughout the entire waveguide length
3Productivity
If higher doping concentrations are used, then amplification efficiency improves, but optical losses increase in conventional waveguides
Solution Approach 1:
The patent changes the waveguide material parameter from silica to polymer, which has different optical properties and lower intrinsic losses, enabling the use of higher doping concentrations (10^-3 to 10^-1 molar concentration) to achieve efficient amplification without the penalty of increased optical losses that would occur in conventional silica waveguides
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 solution enables practical deployment of waveguide amplification nodes on optical PCBs, reducing optical losses, enabling efficient switching, mode conversion, and multiplexing while allowing for shorter active regions and higher doping concentrations, thus improving signal transmission efficiency.
Implementation Method 1
An optical pump source to pump the doped region and allow light to transmit from the first un-doped region to the second un-doped region when the optical pump illuminates the doped region
Implementation Method 2
The doped region being doped with an amplifying dopant
Data Source
AI summary
An apparatus includes a polymer waveguide having a doped region, with amplifying dopant, separating a first un-doped region and a second un-doped region. The doped region being doped with an amplifying dopant. An optical pump source illuminates the doped region to allow light to transmit from the first un-doped region to the second un-doped region.