Diode-pumped 13 W Yb:KGW femtosecond laser

Abstract

We report on a high-power diode-pumped Yb∶KGWO 4 2 (Yb:KGW) mode-locked laser with a semiconductor saturable absorber mirror (SESAM). For 32.7 W of incident pump power, we generate 261 fs pulses with the maximum average output power of up to 13.0 W and spectrum centered around 1039 nm at 68.4 MHz, corresponding to 190 nJ of single pulse energy and 0.72 MW of peak power. The optical-to-optical conversion efficiency is 39.8%, and the slope efficiency is 64.4%. The Yb:KGW laser exhibits a power stability better than 0.543% of the root-mean-square in 2 h.

A Sub-Picosecond Laser System Based on High-Energy Yb:YAG Chirped-Pulse Regenerative Amplification

“…This makes it an ideal choice for high-power diode-pumped solid-state lasers. Yb:KGW (Ytterbium-doped Potassium Gadolinium Tungstate) [5][6][7] offers a wide absorption bandwidth and emits in a broad range around 1020-1060 nm. It is frequently employed in femtosecond laser systems.…”

2.5W diode-pumped femtosecond Yb:KGW laser

“…[3] Most recently, Yang et al realized a Yb:KGW laser which the average output power up to 13 W with a 261 fs pulse duration. [4] Besides, multi-watts with sub-100 fs pulses have been reported by the combination of KLAS mode locking in recent years. In 2014, Zhao et al reported a Yb:KGW oscillator which could generated 78-fs pulses with a peak power of 0.65 MW and a telescope construction extended the cavity leading to single pulse energy obtained 50 nJ at a repetition rate of 36 MHz.…”