Suppression of FM-to-AM conversion in third-harmonic generation at the retracing point of a crystal

Abstract

FM-to-AM conversion can cause many negative effects (e.g., reducing of margin against damage to the optics) on the performance of a third-harmonic conversion system. In this Letter, the FM-to-AM conversion effect in third-harmonic generation is investigated both at and away from the retracing point of Type II potassium dihydrogen phosphate crystal. Obtained results indicate that the FM-to-AM conversion can be suppressed effectively when the crystal works at the retracing point.

© 2009 Optical Society of America

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