Transverse nonlinear optics in heavy-metal-oxide glass
- Autori: Pasquazi, A; Stivala, S; Assanto, G; Gonzalo, J; Solis, J
- Anno di pubblicazione: 2008
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: nonlinear glasses; self-focusing; spatial solitons; modulational instability; multiple filamentation
- OA Link: http://hdl.handle.net/10447/49273
Abstract
We investigate beam propagation in a heavy-metal-oxide glass of the group Nb2O5–PbO–GeO2 using picosecond pulses in the near infrared. We observe a wavelength-dependent self-focusing, with beam collapse and modulation instability in the Kerr regime at 1.064 micron and stable spatial solitons at 820 nm where multiphoton absorption is present. We report near-infrared beam self-confinement and solitons, filamentation, interactions, and conical emission in the ps regime and discuss them with the aid of a numerical model.