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Compact 1 × N thermo-optic switches based on silicon photonic wire waveguides

The University of Tokyo, Tōkyō, Japan
Optics Express (Impact Factor: 3.53). 12/2005; 13(25):10109-10114. DOI: 10.1364/OPEX.13.010109

ABSTRACT Using silicon photonic wire waveguides, we constructed compact 1 × 1, 1 × 2, and 1 × 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 × 65, 85 × 30, and 190 × 75 μm, 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 μs. Furthermore, switching operations were successfully demonstrated for the 1 × 4 switch.

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