A Compact Second-Harmonic Generator for Tasks of Precision Spectroscopy Within the Range of 240–600 nm

Resumo

We develop a universal design of a second-harmonic generator enabling a high-efficiency conversion of the CW laser radiation to a range of 240–600 nm. The distinctive features of the generator are its compact size and high stability achieved using an all-in-one (monolithic) hermetic body frame, which enables applications of this device in a broad range of precision spectroscopy and laser cooling. We design three systems for radiation conversion to ranges of 280, 410, and 560 nm and present their characteristics. The systems are used for laser cooling of magnesium ions (280 nm) and thulium atoms (410 nm). Due to the conversion efficiency and stability, the second-harmonic generators developed surpass most commercially available systems of Western manufacturers.