Abstract
Measurements of the conversion efficiency of second-harmonic generation in KTP (KTiOPO4) by the use of type I phase matching for different fundamental wavelengths of a mode-locked picosecond Ti:sapphire laser are presented. The observed phase matching angles are in agreement with the calculated phase matching curves. At a fundamental wavelength of 834 nm and an intensity of 100 MW/cm2 the conversion efficiency is 4% at maximum, and the corresponding effective nonlinear coefficient d eff is equal to 0.32 pm/V. The experimental values of d eff are related to d 11 (= 0.46 pm/V) of quartz and are in line with the predictions.
© 1995 Optical Society of America
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