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Waveguide dispersion effects in silicon-on-insulator coupled-resonator optical waveguides
Michael L Cooper1, Greeshma Gupta, Mark A Schneider
1University of California, San Diego, Department of Electrical and Computer Engineering, 9500 Gilman Drive, Mail Code 0407, La Jolla, California 92093, USA. mlcooper@ucsd.edu
Optics Letters
|September 18, 2010
Summary
Waveguide dispersion significantly impacts coupled-resonator optical waveguides (CROWs). This study details CROW dispersion and group delay for silicon-on-insulator microring CROWs, revealing band-to-band variations.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- Microring resonators are key components in integrated photonics.
- Coupled-Resonator Optical Waveguides (CROWs) enable novel optical functionalities.
- Waveguide dispersion is a critical factor influencing CROW performance.
Purpose of the Study:
- To derive expressions for CROW dispersion and group delay.
- To investigate the impact of constituent waveguide dispersion on CROW characteristics.
- To analyze the band-to-band dependence of bandwidth and group delay.
Main Methods:
- Theoretical derivation of dispersion and group delay equations for silicon-on-insulator microring CROWs.
- Experimental validation of the derived theoretical models.
- Analysis of single-mode silicon waveguide dispersion properties.
Main Results:
- Demonstrated theoretical and experimental dependence of CROW bandwidth and group delay on waveguide dispersion.
- Quantified the band-to-band variation in dispersion characteristics.
- Identified the significant role of silicon waveguide dispersion in CROW performance.
Conclusions:
- Waveguide dispersion is a crucial design parameter for microring CROWs.
- Understanding band-to-band dispersion is essential for optimizing CROW devices.
- The findings provide insights for designing high-performance silicon photonic devices.
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