We demonstrate a synchronously pumped high-gain optical parametric oscillator with feedback through a fiber, using a passively mode-locked Yb:YAG thin-disk laser as a pump source. We obtain as much as 19-W average signal power at a wavelength of 1.45 μm in 840-fs pulses and 7.8 W of idler power at 3.57 μm . The repetition rate of the pulses is 56 MHz, and the transverse beam quality of the generated signal is M2<1.6 .
© 2004 Optical Society of America
T. Südmeyer, E. Innerhofer, F. Brunner, R. Paschotta, T. Usami, H. Ito, S. Kurimura, K. Kitamura, D. C. Hanna, and U. Keller, "High-power femtosecond fiber-feedback optical parametric oscillator based on periodically poled stoichiometric LiTaO3," Opt. Lett. 29, 1111-1113 (2004)