BROWSE
Detail
Journal Article
Compact Hybrid-Integrated 4 × 80-Gbps TROSA Module Using Optical Butt-Coupling of DML/SI-PD and Silica AWG Chips
Cited 4 time in 
Share 
Share
- Authors
- Seok-Jun Yun, Young-Tak Han, Seok-Tae Kim, Jang-Uk Shin, Sang-Ho Park, Dong-Hoon Lee, Seo-Young Lee, Yongsoon Baek
- Issue Date
- 2021-04
- Citation
- IEEE/OSA Journal of Lightwave Technology, v.39, no.8, pp.2468-2475
- ISSN
- 0733-8724
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- We have developed a compact 4 × 80-Gbps transmitter-receiver optical subassembly (TROSA) module using a chip-to-chip optical butt-coupling method. For a Tx submodule, four directly modulated laser (DML) chips precisely bonded on a silicon DML-carrier are simultaneously butt-coupled to a vertically polished silica-based arrayed waveguide grating (AWG) chip, revealing good optical characteristics insensitive to external optical feedback. A Rx submodule is realized by passive alignment between a 45째-polished AWG and four surface-illuminated (SI)-PD chips, and subsequently integrated with the Tx submodule into a single package case to form the compact TROSA module whose size is only 25 mm × 15 mm × 6.4 mm and compliant to fit into the QSFP-DD/OSFP transceiver. The fabricated TROSA module shows clear Tx optical eye patterns at 80-Gbps PAM4 signals for all channels, achieving the Rx sensitivities within -7.1~-6 dBm at a bit error rate (BER) of 2.4 × 10-4.
- KSP Keywords
- Bit Error rate, Coupling method, Directly modulated laser(DML), Optical characteristics, PAM4 signals, Silica-based, Transmitter and receiver, arrayed waveguide grating(AWG), butt-coupling, chip-to-chip, eye patterns