Figure 2.

Silicon photonics platform cross-sections (top) and building blocks per foundry (bottom). Color code: Green = Available/Possible, Grey = Not Available/Possible. Abbreviations: SHWVG Shallow waveguide, DEWVG Deeply etched waveguide, DSWVG double-stripe waveguide, WVGX Waveguide crossing, Y-B Y-branch, DC Directional coupler, MMI Multi-Mode Interference coupler, SPGC Single Polarization Grating Coupler, PSGC Polarization Splitting GC, SSC Spot-Size Converter, EO-MOD Electro-Optic Modulator, TO-MOD Thermo-Optic Modulator, PN-MOD PN Junction Modulator, RR Ring Resonator, AWG Arrayed Waveguide Grating, DBR Distributed Bragg Reflector, SOA Semiconductor Optical Amplifier, PD Photo-Detector, BPD Balanced PD.