We demonstrate a self-starting Kerr-lens mode-locked (KLM) Yb:YAG thin-disk oscillator operating in the regime of positive intracavity group-delay dispersion (GDD). It delivers 1.7 ps pulses at an average power of 17 W and a repetition rate of 40 MHz. Dispersive mirrors compress the pulses to a duration of 190 fs (assuming shape; Fourier limit: 150 fs) at an average power level of 11 W. To our knowledge, this is the first KLM thin-disk oscillator with positive GDD. Output powers of up to 30 W were achieved with an increased output coupler transmission and intracavity GDD. We demonstrate increase of the pulse energy with increasing positive intracavity GDD, limited by difficulties in initiating mode-locking.
© 2012 Optical Society of AmericaFull Article | PDF Article
E. Innerhofer, T. Südmeyer, F. Brunner, R. Häring, A. Aschwanden, R. Paschotta, C. Hönninger, M. Kumkar, and U. Keller
Opt. Lett. 28(5) 367-369 (2003)
Umit Demirbas, Alphan Sennaroglu, Andrew Benedick, Aleem Siddiqui, Franz X. Kärtner, and James G. Fujimoto
Opt. Lett. 32(22) 3309-3311 (2007)
Binbin Zhou, Zhiyi Wei, Yongdong Zhang, Xin Zhong, Hao Teng, Lihe Zheng, Liangbi Su, and Jun Xu
Opt. Lett. 34(1) 31-33 (2009)