Abstract
We describe how nonresonant recirculation can be used to enhance the efficiency of second-harmonic and third-harmonic generation, as compared to single-pass harmonic generation. Up to four times the doubling efficiency is expected at low pump power. Generated peak harmonic power can exceed that of the pump. The optimized sum-frequency crystal length is shorter for the recirculated configurations than the single-pass triplers.
© 1999 Optical Society of America
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