2R optical regeneration: an all-optical solution for BER improvement
Rochette, M.
Libin Fu
Ta'eed, V.
Moss, D.J.
Eggleton, B.J.
Sch. of Phys., Sydney Univ., NSW;
This paper appears in: Selected Topics in Quantum Electronics, IEEE Journal of
Publication Date: July-Aug. 2006
Volume: 12,
Issue: 4
On page(s): 736-744
Location: Haifa, Israel,
ISSN: 1077-260X
INSPEC Accession Number: 9029047
Digital Object Identifier: 10.1109/JSTQE.2006.876611
Current Version Published: 2006-08-07
Abstract
We show both theoretically and experimentally that signal re-amplifying and reshaping (2R) optical regenerator based on self-phase-modulation (SPM)-induced spectral broadening followed by optical filtering has significant advantages over conventional 2R regenerators. By discriminating amplified spontaneous emission noise from a pulsed signal, the SPM-based regenerator is able to selectively attenuate noise more than the pulsed signal. This unique feature results in a direct improvement in bit-error ratio (BER) of a noisy pulsed signal, whereas conventional 2R regenerators can only prevent BER degradation-not actually improve it. We compare the two classes of regenerator and highlight their fundamental differences. We also demonstrate the BER improvement of a noisy signal filtered with an SPM-based regenerator that utilizes a highly nonlinear silica fiber, and present a compact version by exploiting a short length of As2Se3 chalcogenide glass fiber
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