CMOS-Integrated low-noise germanium waveguide avalanche photodetector operating at 40Gbps

Abstract

Germanium waveguide avalanche photodiode with 10dB gain and excess noise factor with keff below 0.2 was demonstrated. Gain-bandwidth-product above 350GHz was achieved at voltages around 3V. The avalanche photodetector was monolithically integrated into front-end CMOS. © 2009 Optical Society of America.