Accession Number : ADP008115

Title :   Wave-Guides, Y-Junctions, and Other Structures Formed in Bulk Media Using Dark Spatial Solitons,

Corporate Author : AUSTRALIAN NATIONAL UNIV CANBERRA

Personal Author(s) : Davies, Barry L. ; Yang, Xiaoping ; Snyder, Allan W.

Report Date : APR 1992

Pagination or Media Count : 2

Abstract : All-optical devices are essential building blocks for the development of photonics as an advanced technology. In this context, their is considerable interest in spatial solitons and their interaction to provide a means for switching and guiding beams in bulk non-linear materials. Here we consider self-guided beams of planar cross section in a bulk self-defocussing medium where the refractive index change in proportion to intensity. Such beams are also known as spatial solitons. However, only dark solitons are stable to perturbations in 3D, i.e. self-guided beams in a self-defocussing medium. A dark soliton is the 2nd mode at cutoff of the profile it induces whereas a bright soliton is the fundamental mode of the profile it induces. The fundamental dark soliton at wavelength lambda s induces an 'ideal' single mode, graded index profile fiber--ideal in the sense that it propagates a highly confined signal (low power) beam at wavelength lambda, becoming multimoded for a signal with a wavelength shorter than lambda s. The cruel advantage of using dark solitons is that the induced waveguides are highly stable. Spatial solitons are here generated by a quasi-plane wave containing phase or amplitude perturbations.

Descriptors :   *PHOTONICS, *SOLITONS, *WAVEGUIDES, *BULK MATERIALS, AMPLITUDE, CROSS SECTIONS, FIBERS, INDEXES, LIGHT, OPTICS, INTENSITY, INTERACTIONS, LOW POWER, MATERIALS, PERTURBATIONS, PHASE, PLANE WAVES, POWER, PROFILES, REFRACTIVE INDEX, SIGNALS, SWITCHING, MEDIA, ELECTROMAGNETISM, OPTICAL EQUIPMENT, BEAMS(ELECTROMAGNETIC), NONLINEAR ANALYSIS.

Subject Categories : Electrical and Electronic Equipment
      Nuclear Physics & Elementary Particle Physics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE