Ultra-high-extinction-ratio 2 × 2 silicon optical switch with variable splitter

We demonstrate a record-high extinction-ratio of 50.4 dB in a 2 × 2 silicon Mach-Zehnder switch equipped with a variable splitter as the front 3-dB splitter. The variable splitter is adjusted to compensate for the splitting-ratio mismatch between the front and rear 3-dB splitters. The high extinctio...

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Bibliographic Details
Published in:Optics express 2015-04, Vol.23 (7), p.9086-9092
Main Authors: Suzuki, Keijiro, Cong, Guangwei, Tanizawa, Ken, Kim, Sang-Hun, Ikeda, Kazuhiro, Namiki, Shu, Kawashima, Hitoshi
Format: Article
Language:English
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Summary:We demonstrate a record-high extinction-ratio of 50.4 dB in a 2 × 2 silicon Mach-Zehnder switch equipped with a variable splitter as the front 3-dB splitter. The variable splitter is adjusted to compensate for the splitting-ratio mismatch between the front and rear 3-dB splitters. The high extinction ratio does not rely on waveguide crossings and meets a strong demand in applications to multiport circuit switches. Large fabrication tolerance will make the high extinction ratio compatible with a volume production with standard complementary metal-oxide semiconductor fabrication facilities.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.23.009086