Dual-illuminated Parallel-fed Traveling Wave Germanium Photodetectors
15 June 2015
We report 4-stage dual-illuminated Ge traveling wave photodetectors (TWPDs). Dual-illumination doubles the optical channels and boosts DC and RF power handling, resulting in a record figure-of-merit of an RF power-bandwidth area density of 0.66 mW-GHz/um2.