Potassium niobate is employed in an external resonator to generate single-frequency tunable radiation near 430 nm. For excitation with 1.35 W of power from a cw titanium–sapphire laser, 0.65 W of blue light is produced. A simple model has been developed to account for thermal lensing in the nonlinear crystal.
© 1991 Optical Society of America
Original Manuscript: May 14, 1991
Published: September 15, 1991
E. S. Polzik and H. J. Kimble, "Frequency doubling with KNbO3 in an external cavity," Opt. Lett. 16, 1400-1402 (1991)