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.
|Numero di pagine||6|
|Rivista||PHYSICAL REVIEW A, GENERAL PHYSICS|
|Stato di pubblicazione||Published - 2008|
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