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REFERENCES: |
    1) G. D. Boyd, H. M. Kasper, J. H McFee, F. G Storz.
    Linear and nonlinear optical properties of some ternary selenides.
    <a href="https://doi.org/10.1109/JQE.1972.1076900"><i>IEEE J. Quantum Electron.</i>, <b>8</b>, 900-908 (1972)</a><br>
    2) G. C. Bhar.
    Refractive index interpolation in phase-matching.
    <a href="https://doi.org/10.1364/AO.15.0305_1"><i>Appl. Opt.</i> <b>15</b>, 305-307 (1976)</a><br>
    * Ref. 2 provides a dispersion formula based on data from Ref. 1
COMMENTS: |
    Extraordinary ray(e)
CONDITIONS:
    direction: e
DATA:
  - type: formula 2
    wavelength_range: 0.725 13.5
    coefficients: 4.2912 1.3970 0.2845 1.9282 1600