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Phys. Rev. Lett. 93, 113902 (2004) [4 pages]

Observation of Discrete Quadratic Solitons

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R. Iwanow1, R. Schiek1, G. I. Stegeman1, T. Pertsch2, F. Lederer2, Y. Min3, and W. Sohler3
1Center for Research and Education in Optics and Lasers–School of Optics, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816-2700, USA
2Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena, Germany
3Institute of Applied Physics, Universität Paderborn, D-33095 Paderborn, Germany

Received 19 April 2004; published 9 September 2004

Discrete solitons with two frequency components mutually locked by a quadratic nonlinearity have been observed for the first time. Optical experiments have been performed in arrays of coupled channel waveguides with tunable cascaded quadratic nonlinearity. The tunability was the prerequisite that soliton species with different topology could be identified in the same array. Moreover, soliton stability has been experimentally probed. Good agreement with theoretical predictions was found.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.113902
DOI:
10.1103/PhysRevLett.93.113902
PACS:
42.81.Qb, 05.45.–a, 42.65.–k, 63.20.Pw