title: Highly efficient chip-scale III-V/silicon hybrid optical amplifiers.
abstract: We discuss the design and demonstration of highly efficient 1.55 µm hybrid III-V/Silicon semiconductor optical amplifiers (SOA). The optimized III-V wafer stack consists of Al(0.10)In(0.71)Ga(0.18)As multiple quantum wells (MQW) and Al(0.48)In(0.52)As electron stop layers to realize SOAs with high wall-plug efficiency (WPE). We present various designs and experimentally determine WPE values for 2 mW and 0.1 mW input power amplification. The 400 µm long flared SOA achieved the highest WPE value of 12.1% for output power > 10mW and the 400 µm long straight SOA achieved the highest WPE value of 7.3% for output power < 10mW. These are the highest WPE values ever obtained for 1.55 µm SOAs.
authors.forename: S
authors.initials: S
authors.lastname: Cheung
authors.forename: Y
authors.initials: Y
authors.lastname: Kawakita
authors.forename: Kuanping
authors.initials: K
authors.lastname: Shang
authors.forename: S J Ben
authors.initials: SJ
authors.lastname: Yoo