We discuss a time-harmonic inverse scattering problem for nonlinear Helmholtz equation with compactly supported inhomogeneous objects that are described by refractive index in unbounded free space. Assuming the knowledge of far field operator, which maps Herglotz incident waves to patterns corresponding solutions problem, we show refraction is uniquely determined. also generalize two reconstruc...

Optical limiting behaviour of suspensions of single-walled carbon nanotubes in water, ethanol and ethylene glycol is reported. Experiments with 532 nm, 15 nsec duration laser pulses show that optical limiting occurs mainly due to nonlinear scattering. The observed host liquid dependence of optical limiting in different suspensions suggests that the scattering originates from microbubbles formed...

We study, both theoretically and experimentally, the Bragg scattering of light in optically induced photonic lattices and reveal the key physical mechanisms which govern the nonlinear self-action of narrow beams under the combined effects of Bragg scattering and wave diffraction, allowing for selecting bands with different effective dispersion.

Wave dispersion in heterogeneous solids due to scattering within the microstructure is examined. Underlying physics is explored. A theory based on a quasi-harmonic normal model description of the scattering wave energy is developed and compared with phenomenological nonlinear anelasticity models of wave propagation in heterogeneous media.

Delaying and advancement of optical pulses using stimulated Brillouin scattering in As2Se3 fiber is demonstrated. Pulses can be delayed by 37 ns in a 5-m-long fiber with a pump power as low as 60 mW. 2006 Optical Society of America OCIS codes: (999.9999) Slow light; (290.5900) Stimulated Brillouin scattering; (190.4370) Nonlinear optics, fibers; (190.2640) Frequency shifting

We propose a novel method to realize self-induced fast light and signal advancement with no distinct pump source in optical fibers, based on stimulated Brillouin scattering. This scheme can highly simplify real application systems. ©2007 Optical Society of America OCIS codes: (060.4370) Nonlinear optics, fibers; (290.5900) Scattering, stimulated Brillouin; (350.5500) Propagation

We study the inverse scattering problem for the three dimensional nonlinear Schrödinger equation with the Yukawa potential. The nonlinearity of the equation is nonlocal. We reconstruct the potential and the nonlinearity by the knowledge of the scattering states. Our result is applicable to reconstructing the nonlinearity of the semi-relativistic Hartree equation.

A one-dimensional generalized nonlinear Schrödinger equation is considered, and the corresponding inverse scattering problem is analyzed when the potential is compactly supported and depends on the wave function. The unique recovery of the potential is established from an appropriate set of scattering data.

We demonstrate experimentally that a wide control of the group velocity of light can be achieved in conventional optical fibers by use of the stimulated Brillouin scattering effect. Zero, negative and large positive group indices can be readily achieved with a simple experiment.  2005 Optical Society of America OCIS codes: (290.5900) Scattering, stimulated Brillouin; (060.4370) Nonlinear optic...