Generation of red light at 660 nm by frequency doubling a Nd:YAG laser with periodically-poled stoichiometric LiTaO_3

摘要

High power red light was generated from a periodically-poled stoichiometric LiTaO_3 (PPSLT) by single-pass frequency doubling of a diode-side-pumped, Q-switched Nd: YAG laser at 1319 nm. An average power of 2.4 W of the 660 nm red light was obtained at the fundamental power of ～ 5.4 W with the conversion efficiency up to 44.4% and with low fluctuation down to 2%. The high efficiency and stability at the red output indicate that it is a practical method to construct a reliable compact red laser.