Tunable diode-pumped femtosecond Yb-doped phosphate and silicate glass lasers

We demonstrate tunable diode-pumped femtosecond Yb-doped phosphate (Kigre QX/Yb) and silicate (Kigre Q246/Yb) glass lasers. The shortest pulses were ≈60 fs for both glasses and the tuning range for femtosecond pulses extended from 1025 nm to 1065 nm for the phosphate glass laser and from 1030 nm to 1082 nm for the silicate glass laser.