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Numerical analysis of polarization splitter based on vertically coupled microring resonator
Optics Express
|June 17, 2009
Summary
This study demonstrates a polarization splitter using coupled microring resonators. The device exhibits polarization-dependent performance, enabling wavelength-sensitive splitting for optical applications.
Area of Science:
- Photonics and Optical Engineering
- Integrated Optics
- Waveguide Theory
Background:
- Polarization splitters are crucial components in integrated optics.
- Microring resonators offer unique optical properties for device design.
- Understanding polarization dependence is key for advanced optical functionalities.
Purpose of the Study:
- To rigorously investigate the performance of a polarization splitter based on vertically coupled microring resonators.
- To analyze the polarization-dependent spectral responses and eigenmodes.
- To explore the potential for designing wavelength-sensitive integrated polarization splitters.
Main Methods:
- Utilized a 3D full vectorial film mode matching method.
- Employed 3D full vectorial coupled mode theory for analysis.
- Calculated spectral responses for transverse electric (TE) and transverse magnetic (TM) modes.
Main Results:
- Demonstrated strong polarization dependence in microring resonator performance.
- Observed distinct resonance wavelengths for TE and TM modes.
- Achieved a splitting ratio greater than 20dB at 1.55 micrometers.
Conclusions:
- The vertically coupled microring resonator is effective for polarization splitting.
- The design enables wavelength-sensitive polarization separation.
- Geometrical parameter optimization can yield high-performance integrated optical devices.
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