We demonstrate an efficient and compact yellow-green laser at 556 nm generated by intracavity frequency doubling of a continuous wave (CW) laser diode-pumped Nd:YAG laser at 1112 nm. An lithium triborate (LBO) crystal, cut for critical type I phase matching at room temperature, is used for second-harmonic generation (SHG) of the fundamental laser. With an incident pump power of 18 W, as high as 3.2 W of CW output power at 556 nm is achieved. The optical-to-optical conversion efficiency is as high as 17.8%, and the output power stability in 3 h is better than ±4.58%. To the best of our knowledge, this is the highest watt-level yellow-green laser generated by frequency doubling of a diode-pumped Nd:YAG laser at 1112 nm.
© 2009 Optical Society of America
Lasers and Laser Optics
Original Manuscript: June 3, 2009
Revised Manuscript: July 31, 2009
Manuscript Accepted: August 21, 2009
Published: September 18, 2009
Zheng Quan, Yao Yi, Qu Dapeng, Zhou Kai, Liu Yang, and Zhao Ling, "All-solid-state 556 nm yellow-green laser generated by frequency doubling of a diode-pumped Nd:YAG laser," J. Opt. Soc. Am. B 26, 1939-1943 (2009)