Abstract
We report on fundamental and intracavity frequency-doubled emission in a miniature Nd:YVO 4 (3×3×1 mm) laser. A maximum slope efficiency of η s=58.6%, with optical efficiency of η 0=53.0% at 780 mW pump power was realized in a TEM 00 output beam. To obtain the optimum pump-beam focusing conditions we applied a new formalism in which the pump-beam propagation in the active medium was described by its M 2 factor. A good agreement between theoretical predictions and experimental results was observed. In second-harmonic regime, obtained by a KTP crystal, ∼230 mW green power that corresponds to ∼54% nonlinear conversion efficiency was reached.
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