# this file is part of refractiveindex.info database
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REFERENCES: |
    M. J. Rosker, K. Cheng, 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. Quantum Electron.</i> <b>21</b> 1600-1606 (1985)</a>
DATA:
  - type: formula 4
    wavelength_range: 0.3 1.06
    coefficients: 2.1823 0.0125 0 0.0300 1 0 0 0 1
COMMENTS: |
    Room temperature. Ordinary ray (o).
CONDITIONS:
    direction: o