A Compact 100G-ER4 ROSA Realized by Hybrid Integration of SOA and Lensed PIN-PDs for QSFP28 Transceivers. - Young-Tak Han; Dong-Hoon Lee 008; Jang-Uk Shin; Sang-Ho Park; Seok-Tae Kim; Sang-Moon Shin; Hong-Beom Kim; Byoungdon Yoon; Yongsoon Baek (OFC, 2019)