Open AccessCost-effective 400-Gbps micro-intradyne coherent receiver using optical butt-coupling and FPCB wirings
Author(s) -
Seo Young Lee,
Young-Tak Han,
Jong-Hoi Kim,
YoungHo Ko,
Chun-Ju Youn,
Han Young Jung,
Joong-Seon Choe,
Won Seok Han,
Seok-Tae Kim,
Yongsoon Baek
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.028453
Subject(s) - transimpedance amplifier , materials science , optics , photodetector , bandwidth (computing) , optoelectronics , chip , amplifier , computer science , physics , operational amplifier , cmos , telecommunications
We present a cost-effective and bandwidth-enhanced 64-Gbaud micro-intradyne coherent receiver based on hybrid integration of InP waveguide-photodetector (WG-PD) and silica planar lightwave circuit (PLC). InP waveguide-photodetector (WG-PD) arrays are simply chip-to-chip bonded and optically butt-coupled to a silica-based dual-polarization optical hybrid chip. Multiple flexible printed circuit boards are adapted for electrical RF and DC wirings, which provide low-cost integration and good RF performance of the receiver. A 3-dB bandwidth of the fabricated coherent receiver is extended to ~36 GHz by optimization of bondwire inductance between the WG-PD array and the transimpedance amplifier (TIA), even when commercial TIAs with a typical bandwidth of ~29 GHz are used. Through optimization of the silica hybrid integrated coherent receiver, 64-Gbaud DP-16QAM signal transmission over 1050-km standard single-mode fiber is successfully demonstrated below a bit error rate of 2 × 10 -3 . This is the threshold for a soft decision-based forward error correction, at the optical signal to noise ratio of 23.8 dB.