Ultrafast all-optical temporal differentiators based on CMOS-compatible integrated-waveguide Bragg gratings

Rutkowska, KA and Duchesne, D and Strain, Michael and Morandotti, R and Sorel, M. and Azaña, J (2011) Ultrafast all-optical temporal differentiators based on CMOS-compatible integrated-waveguide Bragg gratings. Optics Express, 19 (20). pp. 19514-19522.

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Abstract

We report the first realization of integrated, all-optical first- and higher-order photonic differentiators operating at terahertz (THz) processing speeds. This is accomplished in a Silicon-on-Insulator (SOI) CMOS-compatible platform using a simple integrated geometry based on (π-)phase-shifted Bragg gratings. Moreover, we achieve on-chip generation of sub-picosecond Hermite-Gaussian pulse waveforms, which are noteworthy for applications in next-generation optical telecommunications.