40Gb/s Ge-on-SOI waveguide photodetectors by selective Ge growth

Abstract

Ge waveguide photodetectors with dimension of 7.4 μm × 50 ゼm and 4.4 μm × 100 μm demonstrated optical bandwidth of 31.3 GHz and 29.4 GHz, responsivity of 0.89 A/W and 1.16 A/W at 1550 nm, and 40 Gb/s open eye diagrams at -2V.