Open AccessCoherent transceiver operating at 61-Gbaud/s
Author(s) -
Zhuhong Zhang,
Chuandong Li,
Jun Chen,
Tao Ding,
Yongzhong Wang,
Hui Xiang,
Zijian Xiao,
Liangchuan Li,
Minggang Si,
Xiuguo Cui
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.018988
Subject(s) - phase shift keying , quadrature amplitude modulation , computer science , bit error rate , baud , forward error correction , electronic engineering , transceiver , polarization division multiplexing , clock recovery , digital signal processing , keying , amplitude shift keying , gigabit , on off keying , signal processing , transmission (telecommunications) , cmos , telecommunications , computer hardware , engineering , jitter , clock signal , decoding methods
We use 85-Gs/s digital-to-analog convertor (DAC), 85Gs/s analog-to-digital convertor (ADC), commercial optoelectronic (OE) components with an overall electronic 3dB-bandwidth of less than 15GHz, and novel digital signal processing (DSP) algorithms implemented in CMOS to realize real time coherent transceiver operation at a record baud rate of 61-Gbaud/s. Novel DSP approaches for mitigating narrow filtering effect is critical to acquire data clock, and to improve modem performance. With transmitter pre-emphasis, novel timing recovery, and soft output maximum likelihood sequence estimation (MLSE), we are able to achieve error free operation of single carrier 200-Gbit/s polarization division multiplexed quadrature phase shift keying (PDM-QPSK) after forward error correction (FEC) at 15.2dB OSNR with pre-FEC error rate of 1.4E-2, and single carrier 400-Gbit/s PDM 16-ary quadrature amplitude modulation (16QAM) after FEC at 30.2dB OSNR with pre-FEC error rate of 9.5E-3. Error free transmission for 200-Gbit/s PDM-QPSK and 400-Gbit/s PDM-16QAM was achieved after 1200km propagation with 6dB link margin and 80km propagation respectively.