Second harmonic generation with focused beams under conditions of large group velocity mismatch

Solomon Saltiel, Kaloian Koynov, Ben Agate, Wilson Sibbett

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42 Citations (Scopus)

Abstract

We present a theoretical model that describes the focusing conditions for second-harmonic generation (SHG) of focused femtosecond pulses as a function of group-velocity mismatch (GVM), with direct application to efficient SHG using a "thick" nonlinear crystal. We observe a direct dependence of the optimal focusing ratio, L/b, on the strength of group-velocity mismatch. Our model also describes the temporal duration of the second-harmonic pulses under these conditions as well as the change in optimal phase mismatch. The theoretical results are compared with an experiment for SHG with focused feratosecond pulses in a "thick" crystal of KNbO3. (C) 2004 optical Society of America.

Original languageEnglish
Pages (from-to)591-598
Number of pages8
JournalJournal of the Optical Society of America B : Optical Physics
Volume21
Issue number3
Publication statusPublished - Mar 2004

Keywords

  • BLUE-LIGHT GENERATION
  • FEMTOSECOND PULSES
  • KNBO3
  • EFFICIENT
  • CRYSTAL

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