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Numerical model of wavelength conversion through cross-gain modulation in semiconductor optical amplifiers
Dong-Xue Wang1, John A Buck, Kevin Brennan
1School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA. michael.d.wang@motorola.com
Applied Optics
|June 27, 2006
Summary
This study introduces a numerical model for wavelength conversion in semiconductor optical amplifiers, analyzing device performance for upconverters and downconverters under various conditions. The novel analytic gain coefficient model enhances understanding of these crucial photonic devices.
Area of Science:
- Photonics and Semiconductor Devices
- Optical Communications
- Nonlinear Optics
Background:
- Wavelength conversion is essential for optical networking.
- Semiconductor optical amplifiers (SOAs) are key components for wavelength conversion.
- Existing models often lack detailed spatial analysis.
Purpose of the Study:
- To develop a steady-state numerical model for wavelength conversion using cross-gain modulation in SOAs.
- To incorporate spatial variations of critical parameters like carrier density and gain.
- To introduce and apply an analytic gain coefficient model for the first time in this context.
Main Methods:
- Developed a steady-state numerical model.
- Included spatial variations of carrier density, gain coefficient, differential gain, and internal loss.
- Applied a novel analytic gain coefficient model.
Main Results:
- Compared the performance of upconverters and downconverters.
- Analyzed performance across different device lengths (long/short) and signal regimes (large/small).
- Validated model predictions against existing studies.
Conclusions:
- The developed model provides a comprehensive analysis of wavelength conversion in SOAs.
- The analytic gain coefficient model offers new insights into SOA converter behavior.
- Performance is dependent on device length and signal regime, guiding future device design.