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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Optimal control theory for optical waveguide design: application to Y-branch structures.

D K Pant¹, R D Coalson, M I Hernández

¹Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.

|March 6, 2008

Summary

A new optimal control theory method enhances optical waveguide design, improving guiding efficiency in Y-branch waveguides and Mach-Zehnder modulators. This computational approach optimizes multiple parameters effectively.

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Area of Science:

Photonics and Waveguide Engineering
Computational Electromagnetics

Background:

Designing optical waveguides like Y-branches and Mach-Zehnder modulators requires careful parameter selection for efficient light guiding.
Traditional design methods often rely on intuitive parameter choices, which may not yield optimal performance.

Purpose of the Study:

To apply a novel optimal control theory method to the design of Y-branch waveguides and Mach-Zehnder modulators.
To evaluate the effectiveness of this method in improving guiding efficiency compared to conventional approaches.

Main Methods:

Utilized a recently introduced optimal control theory framework for waveguide design.
Simultaneously optimized numerous design parameters within a defined scheme.
Assessed the computational scalability with an increasing number of parameters.

Main Results:

Achieved significant improvements in guiding efficiency for both Y-branch waveguides and Mach-Zehnder modulators.
Demonstrated that the method outperforms designs based on intuitively chosen parameters.
Observed that computational effort scales mildly with the number of optimized parameters.

Conclusions:

The optimal control theory method is a powerful tool for enhancing optical waveguide design.
This approach offers a systematic way to achieve superior guiding efficiency in photonic devices.
The method is computationally efficient, making it suitable for complex designs.