title: A simplified scheme for generating narrow-band mid-ultraviolet laser radiation.
abstract: We report on the development and characterization of continuous, narrow-band, and tunable laser systems that use direct second-harmonic generation from blue and green diode lasers with an output power level of up to 11.1 mW in the mid-ultraviolet. One of our laser systems was tuned to the mercury 6(1)S0 → 6(3)P1 intercombination line at 253.7 nm. We could perform Doppler-free saturation spectroscopy on this line and were able to lock our laser to the transition frequency on long time scales.
authors.affiliation: TOPTICA Photonics AG, Lochhamer Schlag 19, 82166 Gräfelfing, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Almog
authors.affiliation: TOPTICA Photonics AG, Lochhamer Schlag 19, 82166 Gräfelfing, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Scholz
authors.affiliation: TOPTICA Photonics AG, Lochhamer Schlag 19, 82166 Gräfelfing, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Weber
authors.affiliation: TOPTICA Photonics AG, Lochhamer Schlag 19, 82166 Gräfelfing, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Leisching
authors.affiliation: TOPTICA Photonics AG, Lochhamer Schlag 19, 82166 Gräfelfing, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Kaenders
authors.affiliation: Max-Planck Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany.
authors.forename: Th
authors.initials: T
authors.lastname: Udem