Ameneh Bostani

TL;DR: This device is demonstrated to be fully phased-matched simultaneously for both second-order nonlinear up-conversion processes, namely second harmonic generation and sum frequency generation and the measurement of the generated sum-frequency power versus wavelength agrees well with the theory.

TL;DR: It is demonstrated theoretically and experimentally, that the non-uniform spectra of second harmonic generation (SHG) from an unapodized step-chirped periodically poled nonlinear optical grating can be apodized utilizing tightly-focused Gaussian beams to suppress the ripple in its wideband response.

TL;DR: The possibility of agile multicasting for wavelength division multiplexing (WDM) networks, of a single-channel to two and seven channels over the C band, also extendable to S and L bands, is experimentally demonstrated.

TL;DR: In this paper, the second-order nonlinearity in uniform and chirped gratings in ferroelectric materials has been studied analytically and numerically, and it is shown that the displacement of the poled region from a specific location in second-Order nonlinear materials can introduce a wavelength shift in a uniform grating's second harmonic intensity peak and strongly influences the bandwidth and ripple in the harmonic conversion response of chirping gratings.

TL;DR: A specially-designed apodized chirped PPLN based on particular positioning of poled regions within the periods has been realized theoretically and experimentally to demonstrate the reciprocal response in the SHG spectra over a 30-nm bandwidth, for up-chirp and down- chirp directions.