High-power deep-ultraviolet light generation at 266 nm from frequency quadrupling of a picosecond pulsed 1064 nm laser with a Nd:YVO<sub>4</sub> amplifier pumped by a 914 nm laser diode
Yosuke Orii, Kento Yoshii, Kenta Kohno, Hiroki Tanaka, Kimihiko Shibuya, George Okada, Yusuke Mori, Junichi Nishimae, Masashi Yoshimura
Abstract
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 YVO 4 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:YVO 4 amplifier are the highest ever reported, to the best of our knowledge.