Compact neodymium laser with semiconductor-laser pumping and frequency conversion to the fourth harmonic

A compact source of coherent ultraviolet radiation was constructed from a YAG:Nd³⁺ laser pumped by semiconductor laser diodes. The average output power at λ = 266 nm was 1.1 mW when the electrical pump power was 6.4 W. The duration of the output pulses was 5 ns, the power carried by them was 37 W, and the repetition frequency was 6 kHz.