Compact silicon photonic resonance-sssisted variable optical attenuator

A two-part silicon photonic variable optical attenuator is demonstrated in a compact footprint which can provide a high extinction ratio at wavelengths between 1520 nm and 1620 nm. The device was made by following the conventional p-i-n waveguide section by a high-extinction-ratio second-order micro...

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Bibliographic Details
Published in:Optics express 2016-11, Vol.24 (24), p.27600-27613
Main Authors: Wang, Xiaoxi, Aguinaldo, Ryan, Lentine, Anthony, DeRose, Christopher, Starbuck, Andrew L, Trotter, Douglas, Pomerene, Andrew, Mookherjea, Shayan
Format: Article
Language:English
Online Access:Get full text
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Summary:A two-part silicon photonic variable optical attenuator is demonstrated in a compact footprint which can provide a high extinction ratio at wavelengths between 1520 nm and 1620 nm. The device was made by following the conventional p-i-n waveguide section by a high-extinction-ratio second-order microring filter section. The rings provide additional on-off contrast by utilizing a thermal resonance shift, which harvested the heat dissipated by current injection in the p-i-n junction. We derive and discuss a simple thermal-resistance model in explanation of these effects.
ISSN:1094-4087
DOI:10.1364/OE.24.027600