Title :
Phase-Transparent Amplification of 16 QAM Signals in a QD-SOA
Author :
Lange, Stanislav ; Contestabile, G. ; Yoshida, Yutaka ; Kitayama, Ken-ichi
Author_Institution :
Scuola Superiore Sant´Anna, Pisa, Italy
Abstract :
We study the nonlinear phase distortions in a columnar quantum dot semiconductor optical amplifier (QD-SOA) for coherent 16 quadrature amplitude modulation (QAM) signals. A few ps gain recovery in the QD-SOA enables suppression of the pattern dependent phase noise, which is a major performance limiting issue in conventional SOAs. A 25 dB phase and intensity transparent amplification of 40 Gb/s 16 QAM signals is experimentally demonstrated by error vector magnitude measurement.
Keywords :
amplification; quadrature amplitude modulation; quantum dots; semiconductor optical amplifiers; signal reconstruction; 16 QAM signals; QD-SOA; bit rate 40 Gbit/s; coherent 16 quadrature amplitude modulation signals; columnar quantum dot semiconductor optical amplifier; error vector magnitude measurement; gain recovery; intensity transparent amplification; nonlinear phase distortions; pattern suppression; performance limiting issue; phase noise; phase-transparent amplification; Gain; Optical distortion; Quadrature amplitude modulation; Quantum dots; Semiconductor optical amplifiers; Stimulated emission; Quantum dot (QD); coherent modulation formats; semiconductor optical amplifier (SOA);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2287763
