Title :
Impact of Pump-Phase Modulation on FWM-Based Wavelength Conversion of D(Q)PSK Signals
Author :
Elschner, Robert ; Bunge, Christian-Alexander ; Hüttl, Bernd ; Coca, Alexandre Gual i ; Schmidt-Langhorst, Carsten ; Ludwig, Reinhold ; Schubert, Colja ; Petermann, Klaus
Author_Institution :
Fachgebiet Hochfrequenztech./Photonics, Tech. Univ. Berlin, Berlin
Abstract :
We investigate both theoretically and experimentally the impact of pump-phase modulation on differential phase shift keying (DPSK) and differential quadrature phase shift keying (DQPSK) signals in fiber-based parametric wavelength converters. It will be shown that the pump-phase modulation used to suppress stimulated Brillouin scattering introduces critical signal degradations and optical SNR penalties on DPSK signals, and more severe on DQPSK signals. Different modulation schemes will be theoretically investigated and the quantitative results are compared to system experiments. Finally, the theoretical results for a single conversion will be extended to multiple conversions to study the cascadability of the wavelength converter.
Keywords :
differential phase shift keying; multiwave mixing; optical fibre communication; optical frequency conversion; optical modulation; phase modulation; quadrature phase shift keying; FWM based wavelength conversion; differential phase shift keying; differential quadrature phase shift keying; fiber-based parametric wavelength converters; multiple conversions; pump-phase modulation; single conversion; Brillouin scattering; Degradation; Differential phase shift keying; Differential quadrature phase shift keying; Fiber nonlinear optics; Nonlinear optics; Optical wavelength conversion; Phase modulation; Stimulated emission; Wavelength conversion; Differential phase shift keying (DPSK); differential quadrature phase shift keying (DQPSK); stimulated Brillouin scattering (SBS); wavelength conversion;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2008.920290
