상세정보
학술지
Compact Hybrid-Integrated 4 × 80-Gbps TROSA Module Using Optical Butt-Coupling of DML/SI-PD and Silica AWG Chips
- 발행일
- 202104
- 출처
- IEEE/OSA Journal of Lightwave Technology, v.39 no.8, pp.2468-2475
- ISSN
- 0733-8724
- 출판사
- Optical Society of America (OSA)
- 협약과제
- 20HB1800, 데이터센터 통신용량 증대를 위한 저전력 On-Board 집적 400Gbps 광송수신 엔진 기술, 백용순
- 초록
- 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 제안 키워드
- Bit Error Rate(And BER), 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