Puppin, Michele 500 kHz OPCPA delivering tunable sub-20 fs pulses with 15 W average power based on an all-ytterbium laser. [electronic resource] - Optics express Jan 2015 - 1491-7 p. digital Publication Type: Journal Article ISSN: 1094-4087 Standard No.: 10.1364/OE.23.001491 doi