Passive mode locking in a diode-pumped Nd:GdVO4 laser with a semiconductor saturable absorber mirror

摘要

We demonstrate Q-switched and CW passive mode locking in a laser-diode-pumped Nd:GdVO4 laser with a semiconductor saturable absorber mirror. The repetition rate of the Q-switched envelope increased from 23.1 to 260 kHz as the pump power increased from 1.75 to 13.0 W. At a pump power of 13.7 W, the Q-switched mode locking changed to CW mode locking. The maximum average output power of 4.9 W with a 140-MHz repetition rate was obtained at a pump power of 17.9 W and the single mode-locked pulse energy was 0.035 ΜJ. The CW mode-locked pulse duration was measured to be ∼11.5 ps.