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 deff is equal to 0.32 pm/V. The experimental values of deff are related to d11 (= 0.46 pm/V) of quartz and are in line with the predictions.
© 1995 Optical Society of America
Original Manuscript: July 20, 1994
Revised Manuscript: July 15, 1994
Published: February 20, 1995
M. H. van der Mooren, Th. Rasing, and H. J. A. Bluyssen, "Determination of type I phase matching angles and conversion efficiency in KTP," Appl. Opt. 34, 934-937 (1995)