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We report the microfabrication and characterization of SrTiO3/SiO2/Si ridge waveguides. SrTiO3 films are very attractive for optical integrated systems as they present a high transparency in the visible and infrared wavelength range as well as a relatively high refractive index. In this work, SrTiO3 films were grown by means of a reactive pulsed-laser-deposition technique and patterned using UV photolithography and high-density plasma etching. Propagation and loss characteristics at the telecommunication wavelength of 1.55 μm were investigated using top-view scattering and Fabry-Perot resonance methods. For specific ridge widths, we obtained single-mode propagation with relatively low losses (∼1.5 dB/cm), thereby demonstrating the strong potential of SrTiO3 films for guided-wave components for advanced optical integrated systems. [ABSTRACT FROM AUTHOR]

In this letter, we investigate the nonlinear transmission properties of a one-dimensional micro-structured A1GaAs waveguide with a defect in the middle of a deep-etched Bragg grating. The transmitted spectrum depends on the spectral position of the incident pulse spectrum with respect to the defect mode as well as the pulse intensity. These findings are very important for all optical switching applications and can be explained by the interplay between self-phase modulation of the incident 250 fs pulses in the waveguide and the filtering properties of the defect mode. [ABSTRACT FROM AUTHOR]