title: Laser sources for precision spectroscopy on atomic strontium.
abstract: We present a new laser setup designed for high-precision spectroscopy on laser cooled atomic strontium. The system, which is entirely based on semiconductor laser sources, delivers 200 mW at 461 nm for cooling and trapping atomic strontium from a thermal source, 4 mW at 497 nm for optical pumping from the metastable P23 state, 12 mW at 689 nm on linewidth less than 1 kHz for second-stage cooling of the atomic sample down to the recoil limit, 1.2 W at 922 nm for optical trapping close to the "magic wavelength" for the 0-1 intercombination line at 689 nm. The 689 nm laser was already employed to perform a frequency measurement of the 0-1 intercombination line with a relative accuracy of 2.3 x 10(-11), and the ensemble of laser sources allowed the loading in a conservative dipole trap of multi-isotopes strontium mixtures. The simple and compact setup developed represents one of the first steps towards the realization of a transportable optical standards referenced to atomic strontium.
authors.affiliation: Dipartimento di Fisica and LENS, Instituto Nazionale di Fisica Nucleare, Sezione di Firenze, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Poli
authors.forename: G
authors.initials: G
authors.lastname: Ferrari
authors.forename: M
authors.initials: M
authors.lastname: Prevedelli
authors.forename: F
authors.initials: F
authors.lastname: Sorrentino
authors.forename: R E
authors.initials: RE
authors.lastname: Drullinger
authors.forename: G M
authors.initials: GM
authors.lastname: Tino
mesh_terms: D007834:Lasers; D013055:Spectrophotometry, Infrared; D013057:Spectrum Analysis; D013324:Strontium / Q000032:analysis*
chemical_list: D013324:Strontium