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The tuning capabilities at the frequency doubling of the Yb-doped fiber laser using type-II second harmonic generation (SHG) in a KTP crystal in a walk-off compensated geometry are studied. Three configurations for different wavelengths are compared and the best one that provides a continuous tuning in the range 540–560 nm due to crystal tilting is chosen. The intracavity frequency-doubling scheme is applied to increase the efficiency.
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Akulov et al. (2008) studied this question.
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