Abstract
Thermal lensing has been studied by a probe beam technique in flashlamp-pumped Nd:KGdW laser rods with rod axes positioned in the N p–N g plane and making different angles with the N g optical indicatrix axis. It was found that the orientation of principal meridional planes of the astigmatic thermal lens in Nd:KGdW corresponds to the directions with maximum and minimum values of thermal-expansion coefficient in the plane perpendicular to the rod axis. The athermal Nd:KGdW laser crystal orientation defined as orientation with weak positive near spherical thermal lens has been determined to make an angle of 30○–40○ with the N g axis for light polarization E∥N m.
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Loiko, P.A., Yumashev, K.V., Kuleshov, N.V. et al. Thermal lensing study and athermal directions in flashlamp-pumped Nd:KGd(WO4)2 laser crystal. Appl. Phys. B 106, 881–886 (2012). https://doi.org/10.1007/s00340-011-4777-8
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DOI: https://doi.org/10.1007/s00340-011-4777-8