Bonn 2000 – scientific programme
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Q: Quantenoptik
Q 27: Poster: Nichtlineare Optik
Q 27.9: Poster
Wednesday, April 5, 2000, 10:30–13:30, Aula
Composition dependent nonlinear refractive index of fluoride phosphate glasses for laser applications — •Thomas Töpfer1, Joachim Hein1, Jens Philipps1, Doris Ehrt2, and Roland Sauerbrey1 — 1Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena, Germany — 2Otto-Schott-Institut für Glaschemie, Friedrich-Schiller-Universität Jena, Frauenhoferstr. 6, D-07743 Jena, Germany
Interest of nonlinear behavior of optical materials arises from their application in high power laser systems since the refractive index becomes intensity dependent when exposed to high electric fields. Hence, employing materials with low nonlinear refractive index will minimize associated phenomena such as self-focusing and self phase modulation. We report on measurements of the nonlinear refractive index n2 at 1047 nm of various fluoride phosphate laser glasses relative to fused silica utilizing degenerate four-wave mixing and find good agreement to empirical estimates obtained from the d-line linear refractive index and the Abbe number for pure fluoride-phosphate glasses. Significant increase of n2 is observed when adding sulfate and niobium oxide to the glass composition offering tailorable nonlinear properties for glasses employed in short pulse laser oscillators.