title: Vertical-coupled high-efficiency tunable III-V- CMOS SOI hybrid external-cavity laser.
abstract: We demonstrate a hybrid III-V/SOI laser by vertically coupling a III-V RSOA chip with a SOI-CMOS chip containing a tunable wavelength selective reflector. We report a waveguide-coupled wall-plug-efficiency of 5.5% and output power of 10 mW. A silicon resistor-based microheater was integrated to thermally tune a ring resonator for precise lasing wavelength control. A high tuning efficiency of 2.2 nm/mW over a range of 18 nm was achieved by locally removing the SOI handler substrate. C-band single mode lasing was confirmed with a side mode suppression ratio of 35 dB. This grating coupler based vertical integration approach can be scaled up in two dimensions for efficient multi-wavelength sources in silicon photonics.
authors: Shiyun
authors: S
authors: Lin
authors: Stevan S
authors: SS
authors: Djordjevic
authors: John E
authors: JE
authors: Cunningham
authors: Ivan
authors: I
authors: Shubin
authors: Ying
authors: Y
authors: Luo
authors: Jin
authors: J
authors: Yao
authors: Guoliang
authors: G
authors: Li
authors: Hiren
authors: H
authors: Thacker
authors: Jin-Hyoung
authors: JH
authors: Lee
authors: Kannan
authors: K
authors: Raj
authors: Xuezhe
authors: X
authors: Zheng
authors: Ashok V
authors: AV
authors: Krishnamoorthy