Title :
Using Semiconductor-Optical Amplifiers With Constant Envelope WDM Signals
Author :
Ciaramella, Ernesto ; D´Errico, Antonio ; Donzella, Valentina
Author_Institution :
Scuola Superiore Sant´´Anna, Pisa
fDate :
5/1/2008 12:00:00 AM
Abstract :
Semiconductor-optical amplifiers (SOAs) could be used in wavelength-division multiplexing (WDM) systems with constant envelope modulation formats. However if chromatic dispersion affects their constant envelope, WDM signals can interact via the SOA carrier density fluctuations, resulting into relevant penalty. We experimentally and theoretically investigate the operating conditions for SOA-based amplification with DPSK and POLSK modulation formats and clarify the role of input power, residual dispersion and modulation format. We also determine that, for a given format, the various detection schemes can result into very different impairments. These results can be used as guidelines for the system design.
Keywords :
differential phase shift keying; optical fibre communication; optical fibre dispersion; optical modulation; semiconductor optical amplifiers; wavelength division multiplexing; DPSK modulation format; POLSK modulation format; SOA; WDM signals; carrier density fluctuations; chromatic dispersion; constant envelope modulation formats; residual dispersion; semiconductor optical amplifiers; wavelength-division multiplexing systems; Charge carrier density; Differential quadrature phase shift keying; Fluctuations; Optical amplifiers; Optical fiber communication; Optical fiber dispersion; Phase modulation; Polarization shift keying; Semiconductor optical amplifiers; Wavelength division multiplexing; Differential phase shift keying (DPSK); cross gain modulation (XGM); cross-phase modulation (XPM); optical fiber communication; polarization-shift keying (POLSK); semiconductor optical amplifiers (SOA);
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2007.914883
