Optical third harmonic generation during femtosecond pulse diffraction in a Bragg grating

Saulius Juodkazis, Eugenijus Gaižauskas, Vygandas Jarutis, Jürgen Reif, Shigeki Matsuo, Hiroaki Misawa

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We report on a novel phenomenon occurring when ultrashort laser pulses are diffracted in a Bragg grating recorded in a photo-thermo-refractive glass: two intense beams at the third harmonic of the incident laser frequency appear between the direct and the diffracted laser beams. A high conversion efficiency of about 0.04% at an incident intensity of 5 × 1011 W cm -2 in a 1 mm thick grating is attributed to self-phase matching for the third harmonic generation via Cherenkov radiation from the interfering third order polarization of the incident and diffracted beams. It is assumed that this is a general phenomenon for diffraction in a volume grating.

Original languageEnglish
Pages (from-to)50-53
Number of pages4
JournalJournal of Physics D: Applied Physics
Volume39
Issue number1
DOIs
Publication statusPublished - 2006 Jan 7
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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