Abstract
We systematically study the characteristics of the Cherenkov second-harmonic generation in periodically poled lithium niobate by femtosecond pulses. A relatively high conversion efficiency is obtained and what we believe to be a new different explanation is proposed that nonlinearities in the domain wall region have been enhanced significantly, which is a new feature of the domain wall that has not been studied previously.
© 2010 Optical Society of America
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