We report on dual active element Yb:KGW regenerative amplifier that provides ultrashort pulses in the 0.3 mJ range at high repetition rates. Each active element was pumped by two 50 W diode pump modules at 980 nm. 30W average power was obtained at 100 kHz repetition rate. Measured spectrum width of 5,4 nm allows for compression of amplified pulses to sub-300 fs pulse duration. As output power increases above 15 W nearly symmetrical Gaussian profile beam becomes slightly elliptical, although remains Gaussian in transverse directions. The measured beam quality parameter M² is below 1,5 even at maximum output power.

Date Published: 10 August 2007
PDF: 8 pages
Proc. SPIE 6731, International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems, 67312Y (10 August 2007);

Published in SPIE Proceedings Vol. 6731:
International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems
Valentin A. Orlovich; Vladislav Panchenko; Ivan A. Scherbakov, Editor(s)