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Dispersion tailoring of the quarter-wave Bragg reflection waveguide.
Optics Express
|June 12, 2009
Summary
We derived formulas for dispersion in quarter-wave Bragg reflection waveguides (QtW-BRW). These waveguides exhibit tunable dispersion properties, crucial for designing advanced nonlinear optical devices.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Dispersion management is critical for nonlinear optical devices.
- Quarter-wave Bragg reflection waveguides (QtW-BRW) offer unique optical properties.
Purpose of the Study:
- To derive analytical formulas for polarization-dependent dispersion in QtW-BRWs.
- To explore the tunability of dispersion characteristics in QtW-BRWs.
- To identify design strategies for controlling group velocity dispersion (GVD).
Main Methods:
- Derivation of analytical formulae for first- and second-order dispersion.
- Analysis of polarization-dependent properties.
- Identification of material-dominated and waveguide-dominated dispersion regimes.
Main Results:
- Birefringence sign change at the QtW wavelength.
- Identification of distinct dispersion regimes.
- Demonstration of tunable GVD (large anomalous or small magnitude) via layer thickness control.
Conclusions:
- QtW-BRWs can be engineered for specific dispersion requirements.
- Tunable dispersion is achievable through precise layer thickness selection.
- These findings have implications for nonlinear optical devices in compound semiconductors.
