Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Poster I
Q 21.80: Poster
Dienstag, 9. März 2010, 16:00–19:00, Lichthof
Performance of all-optical phase-preserving amplitude regeneration techniques — •Daniel Endres1, Klaus Sponsel2, Christian Stefan2, Georgy Onishchukov2, Bernhard Schmauss1, and and Gerd Leuchs2 — 1University of Erlangen, Erlangen, Germany — 2Max-Planck Institute for the Science of Light, Erlangen, Germany
With the advance to higher bitrates and advanced modulation formats in fiber optical communication, the demand for new all-optical signal regeneration techniques arises. Two widely considered types of such regenerators are the nonlinear amplifying loop mirror [1] (NALM) based on a nonlinear fiber Sagnac interferometer and a fiber optical parametric amplifier [2] (FOPA) driven as an optical limiter.
In this work we compare these two techniques in their capability to reduce amplitude noise of phase-modulated signals with emphasis on differential phase-shift keying and their possible application in transmission systems. Both regenerators deteriorate the signal by excess noise generation of various origins. While the NALM performance is mainly limited due to Rayleigh backscattering, the major noise source of a FOPA is the pump noise. The work involves both simulation and experimental results.
[1] K. Cvecek, K. Sponsel, G. Onishchukov, B. Schmauss and G. Leuchs: 2R-Regeneration of an RZ-DPSK signal using a nonlinear amplifying loop mirror, IEEE Phot.Tech.Lett. 17,3 p.146 (2005)
[2] K. Inoue: Optical level equalization based on gain saturation in fibre optical parametric amplifier, Electronics Letters 36,12 p.1016 (2000)