Multi-Depth Polarization Rotator for TM-to-TE Mode Conversion
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Solution Overview
Problem
Existing optical signaling and processing systems face challenges in efficiently converting transverse magnetic (TM) mode to transverse electric (TE) mode in optical signals, leading to inefficiencies in signal transmission and processing.
Innovation Solution
A multiple depth polarization beam splitter and rotator are used in silicon photonic platforms to suppress the TM mode, employing a structure with slabs of varying thickness and tapering to convert TM mode into TE mode with improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional optical signaling systems are used, then signal transmission is possible, but TM mode conversion to TE mode is inefficient
Solution Approach 1:
The patent introduces a vertical dimension by employing slabs of varying thicknesses (first slab with thickness T1, second slab with thickness T2, third slab with thickness T3) to create depth-dependent polarization control. This multi-depth structure enables effective TM mode suppression and TE mode conversion that cannot be achieved with planar structures alone, directly resolving the mode conversion efficiency problem
2Productivity
If TM mode is not suppressed, then signal transmission continues, but conversion to TE mode is incomplete
Solution Approach 1:
The patent applies different thickness characteristics to different spatial locations (first slab with T1, second slab with T2, third slab with T3) to create localized polarization control zones. Each slab region provides tailored TM suppression and TE conversion, ensuring complete mode transformation while maintaining signal integrity and processing efficiency
3Adaptability or versatility
If simple optical structures are used, then device complexity is low, but polarization control capability is insufficient
Solution Approach 1:
The patent divides the optical structure into multiple functional slabs (first slab with thickness T1, second slab with thickness T2, third slab with thickness T3) where each segment performs specific polarization control functions. This segmentation enables sophisticated TM to TE mode conversion while maintaining modular design that facilitates manufacturing and integration
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 conversion of TM mode to TE mode enhances signal transmission by ensuring only TE mode remains, improving the efficiency and effectiveness of optical signal processing.
Implementation Method 1
A multiple depth polarization beam splitter and rotator are used in silicon photonic platforms to suppress the TM mode, employing a structure with slabs of varying thickness and tapering to convert TM mode into TE mode
Data Source
AI summary
Optical devices and methods of manufacture are presented in which a first photonic device comprises a rotator section and a splitter section. The rotator section comprises multiple slabs, such as a first slab and a second slab, with different thicknesses. The splitter section comprises a first waveguide and a second waveguide coupled to the first waveguide.