Polymer Optical Waveguide Grooves for Curved-Core Crosstalk
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Solution Overview
Problem
Conventional polymer waveguides with curved cores experience crosstalk due to light leakage, leading to signal quality deterioration and transmission errors.
Innovation Solution
A polymer optical waveguide design featuring grooves with inclined wall surfaces between adjacent cores to redirect leaked light away from adjacent cores, reducing crosstalk by refracting leaked light away from the core plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cores have a curved shape to accommodate different pitch at input and output ends, then the waveguide can connect different pitch sections, but crosstalk occurs due to light leakage between adjacent cores
Solution Approach 1:
A groove structure is introduced as an intermediary element between adjacent cores. This groove acts as a mediator that intercepts and redirects leaked light away from adjacent cores, preventing crosstalk while allowing the curved core configuration to maintain pitch variation adaptability
Solution Approach 2:
The groove structure extends in the vertical dimension (thickness direction of the waveguide) to intercept light that leaks horizontally between cores. By utilizing the vertical dimension, the groove redirects leaked light away from the core plane without affecting the horizontal pitch variation accommodation
2Object-affected harmful factors
If grooves are formed in the cladding between adjacent cores, then crosstalk is reduced by redirecting leaked light, but the device structure becomes more complex
Solution Approach 1:
The cladding is segmented by forming grooves between adjacent cores, dividing the continuous cladding structure into separate regions. This segmentation creates distinct light propagation paths and prevents light leakage between cores while maintaining a relatively simple overall structure
Solution Approach 2:
The groove structure is applied locally only in the regions where crosstalk occurs (between adjacent cores), rather than modifying the entire cladding structure. This localized approach reduces crosstalk while minimizing the overall structural complexity
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
Effectively reduces crosstalk between cores, improving signal quality and minimizing transmission errors by redirecting leaked light within the cladding.
Implementation Method 1
the groove has a first wall surface b extending along the two cores, and the first wall surface is inclined with respect to a normal direction of the imaginary plane
Data Source
AI summary
A polymer optical waveguide includes a plurality of cores arranged on an imaginary plane, a cladding disposed around the plurality of the cores, and a groove formed in the cladding and positioned between two cores adjacent each other among the plurality of cores, wherein the groove has a first wall surface extending along the two cores, and the first wall surface is inclined with respect to a normal direction of the imaginary plane.