Jpn. J. Appl. Phys. 44 (2005) pp. L1358-L1360 |Previous Article| |Next Article| |Table of Contents|
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Observation of Small Sub-Pulses Out of the Delayed-Interference Signal-Wavelength Converter
Department of Electronics Engineering, University of Electro-Communications, 1-5-1 Chohugaoka, Chohu, Tokyo 182-8585, Japan
1Research Center COM, Technical University of Denmark, Bldg. 345v, DK-2800 Kgs. Lyngby, Denmark
(Received May 24, 2005; accepted September 2, 2005; published October 21, 2005)
The generation of small sub-pulses in the delayed-interference signal-wavelength converter (DISC), which has been studied for use in future 160-Gb/s optical time division multiplexing–wavelength division multiplexing (OTDM–WDM) communication systems, was recently predicted as a potential problem. In this work, we have experimentally verified the generation of such pulses and its mechanism. In the experiments we used 3.8-ps-long 1.56-µm input pulses with repetition frequencies from 12.5 to 25.0 GHz and a cross-correlation monitoring system with a time resolution of approximately 2 ps.
KEYWORDS:all-optical signal processing, wavelength conversion, delayed-interference signal-wavelength converter (DISC), semiconductor optical amplifier (SOA), nonlinear phase shift
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