Title :
Digital signal processing in 112-Gb/s polarization-multiplexed 16-QAM coherent optical receiver
Author :
Chang, Sun Hyok ; Chung, Hwan Seok ; Kim, Kwangjoon
Author_Institution :
Opt. Internet Res. Dept., Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
In this paper, we discuss digital signal processing methods and its impacts in 112-Gb/s polarization-division-multiplexed 16-ary quadrature amplitude modulation (PDM 16-QAM) coherent optical receiver. Impacts of in-phase/quadrature-mismatch (IQ-mismatch) in the receiver are investigated and the IQ-mismatch compensation by digital signal processing is examined. We also analyze a 16-QAM optical signal generated by applying four-level electrical signals to single in-phase/ quadrature (IQ)-modulator.
Keywords :
digital signal processing chips; optical modulation; optical receivers; quadrature amplitude modulation; 16-QAM optical signal generation; IQ-mismatch compensation; PDM 16-QAM coherent optical receiver; bit rate 112 Gbit/s; digital signal processing method; four-level electrical signal; in-phase-quadrature-mismatch compensation; polarization-division-multiplexing; quadrature amplitude modulation; single IQ-modulator; single in-phase-quadrature-modulator; Lasers; Lead; IQ mismatch; Optical fiber communication; Optical modulation; PDM;
Conference_Titel :
ICT Convergence (ICTC), 2011 International Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4577-1267-8
DOI :
10.1109/ICTC.2011.6082613
