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REFERENCES: "1) Icenogle et al.. Refractive indexes and temperature coefficients of germanium and silicon <a https://doi.org/10.1364/AO.15.002348\"><i>Appl. Opt.</i> <b>15</b> 2348-2351 (1976)</a><br>2) N. P. Barnes and M. S. Piltch. Temperature-dependent Sellmeier coefficients and nonlinear optics average power limit for germanium <a href=\"https://doi.org/10.1364/JOSA.69.000178\"><i>J. Opt. Soc. Am.</i> <b>69</b> 178-180 (1979)</a><br>*Ref. 2 provides temperature-dependent Sellmeier equations based on data from Ref. 1."
COMMENTS: "293 K (20 °C)"
DATA:
  - type: formula 2
    wavelength_range: 2.5 12
    coefficients: 8.28156 6.72880 0.44105 0.21307 3870.1
