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Diode-pumped self-frequency doubling Nd:GdCa4O(BO3)3 lasers : towards green microchip lasers

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Figure

Fig. 3. Energy-level diagram of Nd 3⫹ ions in GdCOB at 77 K.
Fig. 4. Peak output power at 1060 and 1091 nm for the 7-at. % doped Nd:GdCOB crystal versus crystal temperature in  square-wave modulated operation; the average absorbed pump power was 140 mW, and the peak absorbed pump power was 1200 mW.
Fig. 7. Infrared output power versus absorbed pump power with the plano–plano cavity and the 7-at
Fig. 9. Green and infrared output power versus orientation of a 4-mm-long Nd:GdCOB crystal for a rotation around (a) the Z axis and (b) an axis perpendicular to Z and the light propagation in the plano–plano cavity.

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