# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
# copyright and related rights waived via CC0 1.0

REFERENCES: |
    K. Kato and E. Takaoka.
    Sellmeier and thermo-optic dispersion formulas for KTP.
    <a href="https://doi.org/10.1364/AO.41.005040"><i>Appl. Opt.</i> <b>41</b>, 5040-5044 (2002)</a>.
COMMENTS: |
    n<sub>β</sub>; 20 °C.
CONDITIONS:
    temperature: 293
    direction: beta
DATA:
  - type: formula 4
    wavelength_range: 0.43 3.54
    coefficients: 3.45018 0.04341 0 0.04597 1 16.98825 0 39.43799 1