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REFERENCES: |
    S. Das, G. C. Bhar, S. Gangopadhyay, C. Ghosh.
    Linear and nonlinear optical properties of ZnGeP<sub>2</sub> crystal for infrared laser device applications: Revisited.
    <a href="https://doi.org/10.1364/AO.42.004335"><i>Appl. Opt.</i> <b>42</b>, 4335-4340 (2003)</a>
COMMENTS: |
    Extraordinary ray (e)
CONDITIONS:
    direction: e
DATA:
  - type: formula 2
    wavelength_range: 1.32 11
    coefficients: 2.65014 6.310153 0.125099 1.731381 900