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REFERENCES: "M. J. Rosker, K. Cheng, and C. L. Tang, Practical urea optical parametric oscillator for tunable generation throughout the visible and near-infrared, <a href=\"https://doi.org/10.1109/JQE.1985.1072557\"><i>IEEE J. Quant. Electron.</i> <b>21</b> 1600-1606 (1985)</a>"
DATA:
  - type: formula 9
    range: 0.3 1.06
    coefficients: 2.51527 0.0240 0.0300 0.020 1.52 0.8771
COMMENTS: "Room temperature. Extraordinary ray (e)."