Abstract
We report on a diode-pumped Yb:KGW (ytterbium-doped potassium gadolinium tungstate) laser with a repetition rate of 4.8 GHz and a pulse duration of 396 fs. Stable fundamental modelocking is achieved with a semiconductor saturable absorber mirror (SESAM). The average output power of this compact diode-pumped solid state laser is 1.9 W which corresponds to a peak power of 0.9 kW and the optical-to-optical efficiency is 36%. To the best of our knowledge, this is the femtosecond DPSSL with the highest repetition rate ever reported so far.
Highlights
A wide range of applications benefits from lasers combining short pulses in the femtosecond regime and high repetition rates in the gigahertz regime
The average output power of this compact diode-pumped solid state laser is 1.9 W which corresponds to a peak power of 0.9 kW and the optical-to-optical efficiency is 36%
We report on the highest repetition rate ever obtained with a femtosecond diode-pumped solid-state lasers (DPSSLs)
Summary
A wide range of applications benefits from lasers combining short pulses in the femtosecond regime and high repetition rates in the gigahertz regime. In case of frequency combs [1,2,3,4] from high repetition rate modelocked lasers, the lines are less densely spaced and the average power is divided by less lines. Such combs provide an increased power per mode for the same overall optical bandwidth and total power. High repetition rate femtosecond lasers are beneficial for example for fast data transmission [5] or nonlinear biophotonic applications [6]. A higher repetition rate laser reduces the photodamage possibility [7]
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