Laterally coupled silicon-germanium modulator for passive waveguide systems

Optics Letters
Peng Huei LimK Wada

Abstract

We model a laterally coupled Franz-Keldysh add-drop ring modulator designed to overcome the C-band indirect absorption of silicon-germanium. Although our concept is based on loss-sensitive interferometry, it utilizes the same highly absorptive germanium-rich compositions geared toward complementary metal-oxide semiconductor (CMOS) photodetectors and electroabsorption modulators. The proposed device can be integrated with passive waveguide networks in which the carrier plasma modulation mechanism is ineffective. In addition, unlike previous silicon-germanium modulator schemes, complex butt-coupling between the passive transport and the active silicon-germanium waveguides is not required. Instead, the optical mode remains guided within the transport waveguide, minimizing transition losses.

References

Apr 1, 2009·Optics Express·Kyle PrestonMichal Lipson
Sep 17, 2007·Optics Express·Juejun HuLionel Kimerling
Jul 1, 1987·Applied Optics·C H HenryL E Katz
Nov 16, 2011·Proceedings of the National Academy of Sciences of the United States of America·Jose R Sánchez-PérezRoberto Paiella

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Citations

Jan 12, 2016·Sensors·Sandro RaoFrancesco Giuseppe Della Corte
Feb 12, 2014·Applied Optics·Ya-Ming Li, Bu-Wen Cheng
Dec 3, 2013·Science and Technology of Advanced Materials·Papichaya ChaisakulLaurent Vivien

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