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Expanding the adiabatic design toolbox - more modes, parameters and versatility.
Optics Express
|December 13, 2023
Summary
The MODALL method for adiabatic photonic component design is extended to optimize multi-mode components and reduce modal crosstalk. This advancement leads to ultra-low crosstalk in a fabricated mode multiplexer, improving photonic device performance.
Area of Science:
- Photonics and Optical Engineering
- Materials Science and Engineering
- Computational Electromagnetics
Background:
- Adiabatic design principles enhance photonic component performance.
- The MODALL method optimizes adiabatic photonic components against multiple dimensions and radiation modes.
Purpose of the Study:
- Extend the MODALL method for multi-mode component optimization.
- Enable optimization against an additional degree of freedom.
- Achieve ultra-low modal crosstalk in photonic devices.
Main Methods:
- Derivation of MODALL extensions from existing theory.
- Design, fabrication, and characterization of a mode multiplexer.
- Verification of extended MODALL capabilities.
Main Results:
- Successful extension of MODALL for multi-mode optimization and crosstalk reduction.
- Fabricated mode multiplexer exhibits worst-case crosstalk < -38 dB and median crosstalk < -45 dB.
- Demonstrated optimization against an extra degree of freedom.
Conclusions:
- The extended MODALL method significantly improves adiabatic photonic component design.
- These extensions are applicable to various photonic components like splitters and couplers.
- Enables precise control over modal behavior and crosstalk reduction.
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