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BPM Design Optimization of Mach-Zehnder Type Tandem Optical Switch and Its Operational Characteristics  

Choi, Young-Kyu (신라대 공대 전자공학과)
Kim, Gi-Rae (신라대 공대 전자공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.57, no.10, 2008 , pp. 1829-1834 More about this Journal
Abstract
An optical switch/modulator is designed and the light propagating characteristics is analyzed by the simplified BPM. The distinctive feature of the switch/modulator is that all the waveguide branches are designed to be single-mode. Principle of the device is based on the coupled mode theory in the Y-junction interconnecting waveguide. In spite of all the waveguides are designed to be single-mode, adjusting the interconnecting waveguide length of the device, the same characteristics as existing device up to date is obtainable. Numerical results show that the switching characteristics periodically depends on the interconnecting waveguide length with a spatial of about 150${\mu}m$ in the Ti:LiNbO3 step index waveguide. The concept of design would be utilized effectively in fabricating the monolithic high density of optical integrated circuit.
Keywords
Mach-Zehnder modulator; Optical switch; BPM; Waveguide design;
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