Nanosecond pulse train from a diode-pumped rubidium vapor laser with electro-optical cavity-dumping

Extending diode-pumped alkali lasers (DPALs) toward high-repetition-rate, high-peak-power burst-mode operation broadens their application potential. Here we report the first experimental demonstration of burst-mode operation in DPALs enabled by high-repetition-rate electro-optic cavity dumping under pulsed optical pumping. The cavity-dumping repetition rate reaches up to 1.2 MHz, representing the highest cavity-dumping repetition rate reported to date for DPALs. The cavity-dumped pulses with a FWHM of 11 ns are generated, delivering a maximum peak power of 96 W. At the highest repetition rate, up to 277 pulses are extracted within a single 250 µs pump period, yielding a maximum total burst energy of 322 µJ. These results verify the feasibility of burst-mode cavity dumping in DPALs and highlight its potential for generating high-peak-power, temporally structured laser outputs.