We report efficient generation of high-power, cw, single-frequency radiation in the green in a simple, compact configuration based on single-pass, second-harmonic generation of a cw ytterbium fiber laser at in periodically poled . Using a crystal containing a 17 mm single grating with period of , we generate of cw radiation at for a fundamental power of at a single-pass conversion efficiency of 20.8%. Over the entire range of pump powers, the generated green output is single frequency with a linewidth of and has a spatial profile with . The demonstrated green power can be further improved by proper thermal management of crystal heating effects at higher pump powers and also by optimized design of the grating period to include thermal issues.
© 2008 Optical Society of AmericaFull Article | PDF Article
D. Georgiev, V. P. Gapontsev, A. G. Dronov, M. Y. Vyatkin, A. B. Rulkov, S. V. Popov, and J. R. Taylor
Opt. Express 13(18) 6772-6776 (2005)
Michael Gregory Pullen, Justin James Chapman, and Dave Kielpinski
Appl. Opt. 47(10) 1397-1400 (2008)
Sergey V. Tovstonog, Sunao Kurimura, Ikue Suzuki, Kohei Takeno, Shigenori Moriwaki, Noriaki Ohmae, Norikatsu Mio, and Toshio Katagai
Opt. Express 16(15) 11294-11299 (2008)