title: Compact 1 x N thermo-optic switches based on silicon photonic wire waveguides.
abstract: Using silicon photonic wire waveguides, we constructed compact 1 x 1, 1 x 2, and 1 x 4 Mach-Zehnder interferometer type optical switches on a silicon-on-insulator substrate and demonstrated their switching operations through the thermo-optic effect. These switches were smaller than 140 x 65, 85 x 30, and 190 x 75 mum, respectively. At a 1550-nm wavelength, we obtained an extinction ratio larger than 30 dB, a switching power as low as 90 mW, and a switching response time of less than 100 mus. Furthermore, switching operations were successfully demonstrated for the 1 x 4 switch.
authors.forename: Tao
authors.initials: T
authors.lastname: Chu
authors.forename: Hirohito
authors.initials: H
authors.lastname: Yamada
authors.forename: Satomi
authors.initials: S
authors.lastname: Ishida
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Arakawa