Diode-pumped Kerr-lens mode-locked Yb: GSO laser generating 72 fs pulses

• We experimentally demonstrated a Kerr-lens mode-locked (KLM) Yb:GSO laser for the first time.
• The generated pulses have the pulse duration of 72 fs, which is five times shorter than previous result.
• We used a SESAM to make the KLM operation stable for several hours.

The generation of 72 fs hyperbolic secant pulses centered at 1050 nm with 17.8 nm bandwidth from a diode pumped Kerr-lens mode-locked Yb: GSO laser is demonstrated. With the help of a semiconductor saturable absorber mirror, stable mode-locking with an average output power of 85 mW at a repetition rate of 113 MHz is realized. To the best of our knowledge, this is the first demonstration of Kerr-lens mode-locking in Yb: GSO laser.