Ultralow-crosstalk, strictly non-blocking microring-based optical switch

• DOI: 10.1364/prj.7.000155
• Publication Date: 2019-01-16T16:40:02Z
• Authors: Qixiang Cheng; Liang Yuan Dai; Nathan C. Abrams; Yu-Han Hung; Padraic E. Morrissey; Madeleine Glick; Peter O’Brien; Keren Bergman
• Keywords: Extinction ratio; Crossover switch; Crosstalk; Optical burst switching; Passband; Optical ring resonators

We report on the first monolithically integrated microring-based optical switch in switch-and-select architecture.The fabric delivers strictly non-blocking connectivity while completely canceling firstorder crosstalk.The 4×4 switching circuit consists of eight silicon spatial (de-)multiplexers interconnected by a Si/SiN dual-layer crossing-free central shuffle.Analysis on-state and off-state power transfer functions reveals extinction ratios individual ring resonators exceeding 25 dB, leading to crosstalk suppression up over 50 dB topology.Optical paths are assessed showing losses as low 0.1 per off-resonance 0.5 on-resonance ring.Photonic is actuated with micro-heaters give ~24 GHz passband.The fully packaged device flip-chip bonded onto PCB breakout board UV-curved fiber array.