One-Dimensional Spatial Solitary Waves Due To Cascaded Second-Order Nonlinearities In Planar Waveguides

We report an experimental observation of one-dimensional spatial solitary waves due to cascaded second-order optical nonlinearities

Applications of cascading nonlinear optics to all-optical devices

The application of a cascaded phase shift to a fully integrated nonlinear directional coupler (NLDC) and Mach-Zehnder interferometer (MZI) is presented. It shows that for MZI, the input power was increased and the throughput was modulated between 80% and 20% of the input. For the NLDC, the switching from the cross to the bar states is clear

All-optical mode mixer spatial switch based on cascading in lithium niobate

An all-optically induced spatial shift in the interference between the two lowest-order modes of a lithium niobate channel waveguide was demonstrated based on the power-dependent nonlinear phase shift induced via quadratic cascading

Applications of cascading nonlinear optics to all-optical devices

The application of a cascaded phase shift to a fully integrated nonlinear directional coupler (NLDC) and Mach-Zehnder interferometer (MZI) is presented. It shows that for MZI, the input power was increased and the throughput was modulated between 80% and 20% of the input. For the NLDC, the switching from the cross to the bar states is clear

Second-harmonic generation and cascaded nonlinearity in titanium-indiffused lithium niobate channel waveguides

We summarize and discuss the results of our second-harmonic generation experiments in titanium-indiffused lithium niobate optical channel waveguides. The wave-vector mismatch in the nonlinear wave interaction was varied with temperature tuning around the second-harmonic resonances. Fundamental depletion and second-harmonic tuning curves show a strong power dependence, which is an indication of an intensity-dependent wave-vector modification of the interacting modes. This nonlinear refractive effect (which is called cascaded nonlinearity) is characterized with interferometric measurements of the resulting nonlinear phase shift of the fundamental. Large nonlinear phase shifts (\u3e2π) appear in regions of low fundamental depletion (\u3c10%) because of a nonuniform wave-vector mismatch along the waveguide. At resonance a maximum fundamental depletion of more than 90% was observed. All the measured results are explained well theoretically with a coupled-mode model that has proved to be a reliable design tool for fabricating waveguide devices for applications of the cascaded nonlinearity. © 1998 Optical Society of America

Beam instabilities in second harmonic generation

A new class of quadratic solitons occurs during parametric interactions such as second harmonic generation. The solitons consist of an admixture of the fundamental and harmonic beams, one fundamental for Type I phase-matching and two orthogonally polarized fundamentals for Type II. Modulational instabilities or beam break-up occurs in bulk media, leading in certain cases to periodic patterns of spatial solitons. It has been demonstrated that when two soliton beams interact, they fuse, repulse one another or exchange energy on propagation, depending on the relative phase between the solitons

All-Optical Cross-Connect Switch for Data Center Network Application

We demonstrate a C-band optical cross-connect switch based on InP integrated photonics, butt-coupled to a silica PLC for facile optical alignment. The switch allows the development of low power, low latency and low-cost WDM-switches.</p