Title :
Wavelength conversion of high-order QAM signals for future transparent all-optical networks
Author :
Guo-Wei Lu ; Sakamoto, Takanori ; Kawanishi, Tetsuyas
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol. (NICT), Koganei, Japan
Abstract :
With the recent trend of employing spectrally efficient multi-level modulation formats in optical communication systems, it is highly desirable to exploit the all-optical wavelength conversion (AOWC) schemes for formats, such as 16- or 64-quadrature amplitude modulation (QAM) signals. Since the linear and nonlinear phase noise is transferred with the data to the converted wavelength in AOWC subsystem, it is imperative to optimize the operation condition in AOWC to suppress noise to allow compatibility phase-noise sensitive high-order QAM formats. We first investigate the performance optimization of AOWC for high-order QAMs like 64QAM through four-wave mixing in highly nonlinear fiber, and then discuss our proposed AOWCs schemes for high-order QAM signals such as 16/64-QAM using coherent pumps which is free of phase noise from pumps.
Keywords :
optical fibre networks; optical modulation; optical wavelength conversion; phase noise; quadrature amplitude modulation; AOWC schemes; all-optical wavelength conversion schemes; future transparent all-optical networks; high-order QAM signals; multilevel modulation formats; nonlinear fiber; nonlinear phase noise; optical communication systems; optimization performance; quadrature amplitude modulation; Bit error rate; Laser excitation; Optical wavelength conversion; Phase noise; Probes; Pump lasers; Quadrature amplitude modulation; Quadrature amplitude modulation (QAM); four-wave mixing (FWM); optical signal processing; phase noise; wavelength conversion;
Conference_Titel :
Optical Communications and Networks (ICOCN), 2014 13th International Conference on
Conference_Location :
Suzhou
DOI :
10.1109/ICOCN.2014.6987061
