Sub-nanosecond optical switch based on silicon racetrack resonator

• 作 者: 徐海华 黄庆忠 李运涛 俞育德 余金中
• 机 构: State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sc
• 出 处: Chinese Physics B
• 发表日期: 2010年08期
• 关键词: resonator switch extinction emphasis footprint waveguide offset tunable exceedin

We experimentally demonstrate a small-size and high-speed silicon optical switch based on the free carrier plasma dispersion in silicon.Using an embedded racetrack resonator with a quality factor of 7400,the optical switch shows an extinction ratio exceeding 13 dB with a footprint of only 2.2×10~(-3)mm~2.Moreover,a novel pre-emphasis technique is introduced to improve the optical response performance and the rise and the fall times are reduced down to 0.24 ns and 0.42 ns respectively,which are 25%and 44%lower than those without the pre-emphasis.

We experimentally demonstrate a small-size and high-speed silicon optical switch based on the free carrier plasma dispersion in silicon. Using an embedded racetrack resonator with a quality factor of 7400, the optical switch shows an extinction ratio exceeding 13 dB with a footprint of only 2.2 × 10 ~ (-3) mm ~ 2. Moreover, a novel pre-emphasis technique is introduced to improve the optical response performance and the rise and fall times are reduced to 0.24 ns and 0.42 ns respectively, which are 25 % and 44% lower than those without the pre-emphasis.