Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster II
Q 43.61: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
Regeneration of QPSK signals using phase-sensitive amplification by dual-pump four-wave-mixing process — •Birgit Stiller1,2, Georgy Onishchukov1, Bernhard Schmauss3, and Gerd Leuchs1,2 — 1Max Planck Institute for the Science of Light, Erlangen — 2Institute of Optics, Information and Photonics, University Erlangen — 3Chair for Microwave Engineering, University Erlangen
For the growing demand on higher capacity in fiber-optic communication systems, advanced modulation formats provide a promising solution for significant capacity gains. One of these is multi-level phase-shift keying. Since phase-encoded signals are sensitive also to phase noise, induced by i.e. amplified spontaneous emission or nonlinear phase noise, the regeneration of phase (and amplitude) of the signal is crucial for long-haul transmission systems. In this work, we investigate numerically phase-sensitive amplification of the quadrature phase-shift keyed (QPSK) signal. A four-wave mixing (FWM) scheme with two phase-conjugated pumps, which are equally spaced around the QPSK signal, is used. The pumps are produced by an additional FWM process in another highly nonlinear fiber (HNLF). Dependence of regenerator performance on HNLF parameters has been investigated for 40 Gbaud transmission.