Victor Quiring

Tunable all-optical control of wavelength conversion of 5 ps pulses by cascaded sum-and difference frequency generation (cSFG/DFG) in a Ti:PPLN Waveguide

A 10 GHz, 5 ps pulse stream (/spl lambda//sub s/=1554.8 nm) was wavelength converted in a Ti:PPLN channel waveguide by exploiting cSFG/DFG. The wavelength shift could be optically controlled in a 15 nm wide range by the wavelength of a control beam.

Spatial trapping of short pulses in Ti-indiffused LiNbO(3) waveguides.

We show numerically and experimentally that spatial trapping can be induced in quadratic media even if the pump pulses duration is shorter than the group-delay mismatch between fundamental wave and second-harmonic components. The influence of phase mismatch and pulse power on the trapping effect is discussed. Spatial, temporal, and spectral behaviors that accompany self-trapped propagation are highlighted.

Soliton emission at a phase-mismatch boundary in a quadratic nonlinear film waveguide

We report the experimental demonstration of spatial nonlinear beam displacement caused by an interface between periodically modulated and uniform quadratic nonlinearity. We observe intensity- and phase-mismatch-dependent spatial beam displacement at 1548 nm in lithium niobate waveguides. The device has the potential to provide a soliton-emission-based, ultrafast all-optical switch.

DYNAMICS OF SPATIAL SOLITONS AT PHASE-MISMATCH INTERFACES

We studied the dynamics of spatial solitons at a phase-mismatch interface in quadratic nonlinear waveguides. We present here a simple formalism to analyze intensity-dependent reflection, refraction and emission of beams. Experimental demonstrations at a phase-mismatch PPLN/LiNbO3 interface are reported.