Dark spatial optical solitons in planar gradient waveguides in the Z-cut of the 3m symmetry crystals

Journal Article · Sun Nov 30 00:00:00 EST 2003 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2003V033N11ABEH002539· OSTI ID:21470419

Frolova, M N; Borodin, M V; Shandarov, S M; Shandarov, V M; Larionov, Yu M ^[1]

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1. Tomsk State University, Tomsk (Russian Federation)

The propagation of light beams is studied in a planar photorefractive waveguide fabricated by high-temperature diffusion of metal ions in the Z-cut substrate of the 3m symmetry crystal. The wave equations are obtained for single-mode light beams with TE and TM polarisations in planar diffusion waveguides, which take into account the two-dimensional distribution of the optical field. Expressions are found for a nonlinear change in the refractive index when the photovoltaic mechanism makes a dominant contribution to the photorefractive effect. The propagation of single-mode light beams is analysed numerically for a Ti:Fe:LiNbO{sub 3} waveguide fabricated by the successive diffusion of titanium and iron into lithium niobate. It is shown that single-mode light beams with a smooth amplitude envelope can propagate without significant changes in the region of a dip in the intensity modelling a dark soliton. The relations between the amplitude and width of a dark spatial soliton are obtained for the TM modes of a photorefractive planar waveguide. (solitons)

• OSTI ID: 21470419
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 33, Issue 11; Other Information: DOI: 10.1070/QE2003v033n11ABEH002539; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
DIFFUSION
IONS
IRON COMPOUNDS
LITHIUM COMPOUNDS
NIOBATES
NONLINEAR PROBLEMS
PHOTON BEAMS
PHOTOVOLTAIC EFFECT
POLARIZATION
REFRACTIVE INDEX
SIMULATION
SOLITONS
SUBSTRATES
TEMPERATURE RANGE 0400-1000 K
TITANIUM COMPOUNDS
TWO-DIMENSIONAL CALCULATIONS
VISIBLE RADIATION
WAVE EQUATIONS
WAVEGUIDES
ALKALI METAL COMPOUNDS
BEAMS
CHARGED PARTICLES
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC RADIATION
EQUATIONS
NIOBIUM COMPOUNDS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PARTIAL DIFFERENTIAL EQUATIONS
PHOTOELECTRIC EFFECT
PHYSICAL PROPERTIES
QUASI PARTICLES
RADIATIONS
REFRACTORY METAL COMPOUNDS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS