Real-Time Exploration on Buildup Dynamics of Diode-Pumped Passively Mode-Locked Nd:YVO4 Laser with SESAM

The buildup dynamics of diode-pumped passively mode-locked solid-state laser is thoroughly explored using the real-time measurement with temporal sampling rate of up to 40 GHz. A concise cavity is developed to ensure the transient dynamics purely arising from the gain medium and saturable absorber. Experimental results reveal that the laser output in the buildup process exhibits numerous passively Q-switched pulses followed with a damped relaxation oscillation prior to the stable mode locking. Furthermore, it is confirmed that the laser output has already displayed single clean mode-locked pulses inside the first several Q-switched envelopes before stepping into the stage of relaxation oscillation. The present real-time exploration is expected to provide important information for practical applications with temporal modulation of the pump intensity.

Automated summary

The study thoroughly explores the dynamics of diode-pumped passively mode-locked solid-state lasers using real-time measurement at a temporal sampling rate of up to 40 GHz. A concise cavity is used to isolate the transient dynamics from the gain medium and saturable absorber. The experimental results reveal the presence of passively Q-switched pulses and damped relaxation oscillations before stable mode-locking, indicating the formation of single clean mode-locked pulses before the relaxation oscillation stage. This real-time exploration provides valuable information for practical applications involving temporal modulation of pump intensity.