Wide beam stabilities and instabilities in one dimensional arrays of Kerr-nonlinear channel waveguides

    Authors

    J. Meier; D. N. Christodoulides; G. I. Stegeman; H. Yang; G. Salamo; R. Morandotti; J. S. Aitchison;Y. Silberberg

    Comments

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    Abbreviated Journal Title

    Opto-Electron. Rev.

    Keywords

    discrete nonlinear optics; modulation instability; solitons; OPTICAL DISCRETE SOLITONS; HALF BAND-GAP; DIRECTIONAL-COUPLERS; MODULATIONAL INSTABILITY; SPATIAL SOLITONS; ALGAAS; ABSORPTION; LATTICES; Engineering, Electrical & Electronic; Optics; Physics, Applied

    Abstract

    The propagation of wide (plane-wave like) and narrow high intensity beams at 1550 nm was investigated in ID arrays of AlGaAs channel waveguides which are nearest-neighbour coupled via evanescent fields. Spatial diffraction (beam spreading) by evanescent field coupling leads to dispersion relations that are periodic with propagation direction and hence exhibit regions of both normal and anomalous diffraction. This results in propagation directions in which filamentation of high intensity beams with superimposed noise occurs, and other regions in which these beams are stable against noise. Both cases were observed experimentally, and the modulation instability gain was measured versus the spatial frequency of the noise. Good agreement with theory was found.

    Journal Title

    Opto-Electronics Review

    Volume

    13

    Issue/Number

    2

    Publication Date

    1-1-2005

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    75

    Last Page

    84

    WOS Identifier

    WOS:000230437600002

    ISSN

    1230-3402

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