45-fs Diode-Pumped Passively Mode-Locked Yb:NaY(WO4)2 Soliton Laser

We experimentally demonstrated 45-fs soliton pulses from a diode-pumped passively mode-locked Yb:NaY(WO
₄
)
₂
laser with a semiconductor saturable absorber mirror. The soliton pulses are centered at 1042 nm and have a repetition rate of ~113 MHz. To the best of our knowledge, this is the first demonstration of sub-50-fs soliton pulse generation from the Yb:NaY(WO
₄
)
₂
lasers, and it is also the shortest pulses ever obtained from the Yb-doped tetragonal double tungstate crystal family until now.