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High-power diode-pumped Yb^3+:CaF_2 femtosecond laser

2004; Optica Publishing Group; Volume: 29; Issue: 23 Linguagem: Inglês

10.1364/ol.29.002767

1539-4794

Andrea Lucca, G. Debourg, Mathieu Jacquemet, F. Druon, François Balembois, Patrick Georges, Patrice Camy, Jean‐Louis Doualan, R. Moncorgé,

Laser-Matter Interactions and Applications

We report what is believed to be the first demonstration of a high-power passively mode-locked diode-pumped femtosecond laser based on an Yb3+:CaF2 single crystal, directly pumped by a 15-W fiber-coupled laser diode. With a 5-at. % Yb3+ -doped sample and prisms for dispersion compensation we obtained pulses as short as 150 fs, with 880 mW of average power and up to 1.4-W average output power, with a pulse duration of 220 fs, centered at 1049 nm. The laser wavelength could be tuned from 1040 to 1053 nm in the femtosecond regime. Using chirped mirrors for dispersion compensation, the oscillator provided up to 1.74 W of average power, with a pulse duration of 230 fs, corresponding to a pulse energy of 20 nJ and a peak power of 85 kW.