Diamond guide star laser pulsed at a Larmor frequency

We demonstrate a diamond sodium guide star laser pulsed at a Larmor repetition rate of 350 kHz. The single-frequency 589 nm laser reaches an average output power of 32.6 W with 75.6 W pump power in a duty cycle of 19%. Significant improvement in the intensity fluctuations is observed in the conversion from the pump to the frequency-doubled laser. Temporal behaviors and instant photon conversion of laser fields are also investigated in the experiment. This laser system offers a promising approach to address the need for a high-performance sodium guide star laser source, which is crucial for the advancement of applications in terrestrial astronomy and space-situational awareness.