Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 66: Photonik 4
Q 66.1: Vortrag
Freitag, 16. März 2012, 14:00–14:15, V38.01
Effect of fiber group-velocity dispersion on pulse propagation in a modified Sagnac interferometer — •Tobias Röthlingshöfer1,2,3, Daniel Toth2, Georgy Onishchukov2,3, Bernhard Schmauss3,4, and Gerd Leuchs1,2,3 — 1Institute of Optics, Information and Photonics, University Erlangen — 2Max Planck Institute for the Science of Light — 3Erlangen Graduate School in Advanced Optical Technologies — 4Chair for Microwave Engineering, University Erlangen
The influence of the group-velocity dispersion of the nonlinear fiber of a Sagnac interferometer on the transfer characteristics for picosecond pulses was investigated in numerical simulations.
It was found that operating at a non-zero dispersion regime multilevel all-optical phase-preserving amplitude regeneration can be done most efficient. Anomalous fiber dispersion leads to soliton formation in the nonlinear fiber. This will result in irregularities in the periodicity of the transfer functions. Operating at zero-dispersion was found to be the most critical case for fluctuations of the group-velocity dispersion.
The irregularities in the anomalous dispersion regime can be used for all-optical amplitude noise reduction in advanced modulation formats with unequally power-spaced signal states like 16QAM.