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How phase dispersion of optical coatings affects intracavity second-harmonic generation of laser radiation

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Abstract

This paper discusses how antireflection and reflective optical coatings, as well as the position of a nonlinear crystal inside the cavity, affect intracavity second-harmonic generation. It is shown that phase dispersion of typical antireflection coatings and many reflective coatings is compensated. The phase dispersion of certain types of reflective coatings in this case can introduce a significant contribution to the overall phase dispersion. Dual-frequency reflective coatings are classified with respect to the size of the added part of the generalized phase of the laser wave and its second harmonic. The optimum combinations of types of reflective coatings and the positions of the nonlinear crystal relative to the end mirror are determined for use in lasers with intracavity second-harmonic generation.

© 2014 Optical Society of America

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