Nonlinear Femtosecond Pulse Propagation in Solids and Liquids
Abstract
Femtosecond pulse propagation in various nonlinear media is investigated using the second harmonic form of frequency-resolved optical gating. Both solid and liquid samples are studied over a range of intensities. Experiments are performed in a regime where the confocal parameter is much greater than the propagation length. We observe a dramatic increase in temporal pulse broadening over what is expected from group velocity dispersion (GVD) alone. This broadening can largely be explained by the interplay between positive GVD and the nonlinear index of refraction. Contributions from a non-instantaneous (Raman) nonlinearity are also considered. Experimental results are modeled using a nonlinear Schrödinger equation with inclusion of a Raman response term.
- Publication:
-
APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
- Pub Date:
- May 1998
- Bibcode:
- 1998APS..DMP..F504E