Open AccessUltra-high-extinction-ratio 2 × 2 silicon optical switch with variable splitter
Author(s) -
Keijiro Suzuki,
Guangwei Cong,
Ken Tanizawa,
Sanghun Kim,
Kazuhiro Ikeda,
Shu Namiki,
Hitoshi Kawashima
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.009086
Subject(s) - extinction ratio , optics , fabrication , beam splitter , splitter , optical switch , materials science , extinction (optical mineralogy) , waveguide , optoelectronics , physics , laser , wavelength , medicine , alternative medicine , pathology
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.