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Published on: November 30, 2012
Highly dispersive slot waveguides
Lin Zhang1, Yang Yue, Yinying Xiao-Li
1Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA. linzhang@usc.edu
Optics Express
|April 29, 2009
Summary
We developed a high-dispersion slot-waveguide by coupling slot and strip waveguides. This design achieves significant negative dispersion, beneficial for optical signal processing and dispersion compensation.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Optical waveguides are crucial components in integrated photonics.
- Achieving high and tunable optical dispersion is essential for advanced signal processing.
- Existing waveguide designs often struggle with achieving large, stable dispersion characteristics.
Purpose of the Study:
- To propose and analyze a novel slot-waveguide structure for high optical dispersion.
- To investigate the strong interaction between slot and strip waveguide modes.
- To demonstrate the potential for dispersion compensation and signal processing applications.
Main Methods:
- Coupling a slot waveguide with a strip waveguide.
- Utilizing the strong interaction between slot and strip modes to engineer dispersion.
- Cascading slot-waveguides with varied dimensions for dispersion control.
Main Results:
- Achieved a negative dispersion of up to -181520 ps/nm/km.
- Demonstrated a flat and large dispersion of -31300 ps/nm/km over a 147-nm bandwidth.
- Maintained less than 1% variance in dispersion across the specified bandwidth.
Conclusions:
- The proposed coupled slot-waveguide offers a promising platform for ultra-high dispersion.
- The design enables effective dispersion compensation and advanced optical signal processing.
- Tunable dispersion characteristics make it suitable for a wide range of photonic applications.
