32-Port 5.5%-Δ Silica-Based Connecting Device for Low-Loss Coupling between SMFs and Silicon Waveguides

We report a low-loss connecting technique between silicon waveguides and standard single-mode fibers using a unique extremely-high-Δ silica-based PLC. 32-port coupling with coupling losses of 1.4~1.6 dB/facet and pitch conversion has been demonstrated.