High-peak-power picosecond deep-UV laser sources

High-power deep-ultraviolet light generation at 266 nm from frequency quadrupling of a picosecond pulsed 1064 nm laser with a Nd:YVO4 amplifier pumped by a 914 nm laser diode

We report the generation of picosecond pulsed light at a 266 nm wavelength with an average power of 53 W. We developed a picosecond pulsed 1064 nm laser source with an average power of 261 W, a repetition rate of 1 MHz, and a pulse duration of 14 ps, using a gain-switched DFB laser diode as a seed laser and a 914 nm laser-diode-pumped Nd-doped YVO₄ power amplifier. We achieved stable generation of 266 nm light with an average power of 53 W from frequency quadrupling using an LBO and a CLBO crystals. The amplified power of 261 W and the 266 nm average power of 53 W from the 914 nm pumped Nd:YVO₄ amplifier are the highest ever reported, to the best of our knowledge.