Silicon-on-Insulator 1×2 Y-Junction Optical Switch Based on Waveguide-Vanishing Effect

The silicon-on-insulator(SOI) 1 × 2 Y-junction optical waveguide switch has been proposed and fabricated, which is based on the large cross-ction single--mode rib waveguide condition, the waveguide--vanishing effect and the free-carrier plasma dispersion effect. The SOI switch utilizes silicon and silicon dioxide thermal bonding and back--polishing. The insertion loss and extinction ratio of the device are measured to be less than 4. 78 dB and 20. 8dB respectively at a wavelength of 1. 3pm and an injection current of 45mA. The response time is about 160us.