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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 9, Iss. 3 — Mar. 1, 1992
  • pp: 380–386

Refractive indices of orthorhombic KNbO3. I. Dispersion and temperature dependence

Beat Zysset, Ivan Biaggio, and Peter Günter  »View Author Affiliations

JOSA B, Vol. 9, Issue 3, pp. 380-386 (1992)

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We have measured the refractive indices of potassium niobate in the orthorhombic phase at six different temperatures between 22 and 180°C in the wavelength range 400–3400 nm. Sellmeier coefficients are determined by using a two-term oscillator model with an IR correction term. The temperature-dependent spontaneous polarization and the quadratic polarization optical coefficients are obtained from the index data. For practical purposes the temperature dependence can be well approximated by a polynomial expansion of degree 2.

© 1992 Optical Society of America

Original Manuscript: April 12, 1991
Revised Manuscript: September 23, 1991
Published: March 1, 1992

Beat Zysset, Ivan Biaggio, and Peter Günter, "Refractive indices of orthorhombic KNbO3. I. Dispersion and temperature dependence," J. Opt. Soc. Am. B 9, 380-386 (1992)

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