A 54-fs diode-pumped Kerr-lens mode-locked Yb:LuYSiO₅ laser

We demonstrate a Kerr-lens mode-locked Yb:LuYSiO₅ (Yb:LYSO) laser with the pulse duration of 54 fs, corresponding to a spectral bandwidth of 25 nm centered at 1062 nm. To the best of our knowledge, this is the shortest pulse duration obtained from Yb:LYSO laser. At the repetition rate of 378.3 MHz, an output power of 111.6 mW is obtained using an output coupler with 0.6% transmittance, which can maintain long-time stable mode-locking more than 13 h.