Diode-pumped high-power continuous-wave intracavity frequency-doubled Pr³⁺:YLF ultraviolet lasers around 349 nm

Abstract

High-power continuous-wave ultraviolet lasers are useful for many applications. As ultraviolet laser sources, wavelength switching capability and compact structure are very important to extend the applicability and improve the flexibility in practical applications. In this work, we present two simple and relatively compact schemes by laser diode pumping to obtain watt-level singlewavelength 348.7-nm laser and discrete wavelength tunable ultraviolet lasers around 349 nm (from 334.7 to 364.5 nm) by intracavity frequency doubling based on Pr 3+ :YLF and β-BBO crystal. The maximum output power of the singlewavelength 348.7-nm laser is 1.033 W. The output powers of the discrete wavelength tunable lasers are at the level of tens of milliwatts, except for two peaks at 348.7 and 360.3 nm with output powers of ~500 mW. In addition,

A compact continuous-wave intracavity frequency doubling Pr:YLF ultraviolet laser at 360 nm

“…UV laser has lots of advantages such as short wavelength, easy focusing, high resolution, and large energy, can be widely used in many elds, including spectroscopy, biological analysis, medicine, precision manufacturing, optical data storage, high-resolution printing and lithography [1][2][3][4][5][6]. There are several approaches to obtain UV lasers, the most broadly applied methods is to use nonlinear crystal frequency tripling Nd 3+ :YAG lasers in the cavity.…”