Self-focusing, breakup, and trapping of Raman-shifted femtosecond pulses in homogeneous slab and weakly coupled arrays of nonlinear glass silica waveguides

Yoav Linzon; Dima Cheskis; Iftach Ilsar; Roberto Morandotti; Stewart Aitchison; Shimshon Bar-Ad

doi:10.1117/12.675574

3 February 2006 Self-focusing, breakup, and trapping of Raman-shifted femtosecond pulses in homogeneous slab and weakly coupled arrays of nonlinear glass silica waveguides

Yoav Linzon, Dima Cheskis, Iftach Ilsar, Roberto Morandotti, Stewart Aitchison, Shimshon Bar-Ad

Author Affiliations +

Proceedings Volume 5975, Topical Problems of Nonlinear Wave Physics; 59750T (2006) https://doi.org/10.1117/12.675574
Event: Topical Problems of Nonlinear Wave Physics, 2005, St. Petersburg, Russian Federation

Abstract

We present experimental and numerical studies of pulse propagation in continuous and periodically modulated nonlinear waveguides, made of Silica glass. When intense femtosecond pulses are passed through this χ₃ material, a positive Kerr nonlinearity is formed. The unique characteristic of glass is accessibility to all domains of possible temporal dispersion (normal, zero and anomalous) in the spectral range of currently available femtosecond pulse sources. In particular, the anomalous dispersion regime enables simultaneous self-focusing in space (X) and time (T), yielding complex dynamics of the beam involving several mechanisms that couple between the X and T dimensions. We show that under certain circumstances, the combination of these mechanisms can lead to simultaneous spatial and spectral filtering in the continuous sample as well as steering of the point of break-up, and beam trapping in the periodic sample, using near-field microscopy and conventional spectroscopy.

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Yoav Linzon, Dima Cheskis, Iftach Ilsar, Roberto Morandotti, Stewart Aitchison, and Shimshon Bar-Ad "Self-focusing, breakup, and trapping of Raman-shifted femtosecond pulses in homogeneous slab and weakly coupled arrays of nonlinear glass silica waveguides", Proc. SPIE 5975, Topical Problems of Nonlinear Wave Physics, 59750T (3 February 2006); https://doi.org/10.1117/12.675574

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