Conversion efficiency of 85% has been achieved in cw second-harmonic generation from 1.08 to 0.54 μm with a potassium titanyl phosphate crystal inside an external ring cavity. An absolute comparison between the experimental data and a simple theory is made and shows good agreement.
© 1992 Optical Society of America
Original Manuscript: December 2, 1991
Published: May 1, 1992
Z. Y. Ou, S. F. Pereira, E. S. Polzik, and H. J. Kimble, "85% efficiency for cw frequency doubling from 1.08 to 0.54 μm," Opt. Lett. 17, 640-642 (1992)