Applied Physics A

, Volume 86, Issue 2, pp 165–170 | Cite as

Structural properties of femtosecond laser-induced modifications in LiNbO3

Invited paper

Abstract

Structural modifications induced by femtosecond laser pulses in LiNbO3 were studied. The influence of the processing and focusing parameters was investigated. Two different types of modifications could be identified. High laser fluences cause a refractive index decrease, material damage and stresses in the surrounding crystalline lattice. At low laser fluences, an extraordinary index increase was observed that allows for optical waveguiding. This kind of modification is thermally unstable and correlates to a weak distortion of the lattice. The electrooptic coefficient measured in a waveguide was found to be substantially reduced. The mechanisms underlying the structural modifications are discussed.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • J. Burghoff
    • 1
  • H. Hartung
    • 1
  • S. Nolte
    • 1
  • A. Tünnermann
    • 1
    • 2
  1. 1.Institut für Angewandte PhysikFriedrich-Schiller-Universität JenaJenaGermany
  2. 2.Fraunhofer-Institut für Optik und FeinmechanikJenaGermany

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