Title :
Phase-preserving multilevel amplitude regeneration using a modified nonlinear amplifying loop mirror
Author :
Hierold, Martin ; Roethlingshoefer, Tobias ; Sponsel, Klaus ; Onishchukov, Georgy ; Schmauss, Bernhard ; Leuchs, Gerd
Author_Institution :
Dept. of Microwave Eng., Univ. of Erlangen-Nuremberg, Erlangen, Germany
Abstract :
Optimization of NALM parameters for phase-preserving amplitude regeneration of a multilevel star8-QAM signal was performed in numerical simulations. A Q-factor improvement of 5 dB for each amplitude level was shown. Possibilities of performance improvement using a power-dependent nonlinear phase shift and a nonlinear amplifier gain were investigated. A Q-factor improvement up to 11 dB for each level was obtained.
Keywords :
amplifiers; mirrors; numerical analysis; optical modulation; quadrature amplitude modulation; wavelength division multiplexing; NALM parameter optimisation; Q-factor; modified nonlinear amplifying loop mirror; multilevel star8-QAM signal; nonlinear amplifier gain; numerical simulations; phase-preserving multilevel amplitude regeneration; power-dependent nonlinear phase shift; High speed optical techniques; Interference; Mirrors; Nonlinear optics; Optical fiber couplers; Optical receivers; Optical sensors; Phase noise; Quadrature amplitude modulation; Repeaters; NALM; NOLM; QAM; amplitude multilevel regeneration;
Conference_Titel :
Transparent Optical Networks (ICTON), 2010 12th International Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-7799-9
Electronic_ISBN :
978-1-4244-7797-5
DOI :
10.1109/ICTON.2010.5549253
