OBSERVATION OF THE 5S(2)S(1/2)-4D(2)D(5/2) TRANSITION IN A SINGLE LASER-COOLED TRAPPED SR+ ION BY USING AN ALL-SOLID-STATE SYSTEM OF LASERS

The first application, to our knowledge, of an all-solid-state system of lasers to the study of a single cooled trapped Sr+ ion is described. Quantum jumps have been observed by driving the 674-nm 5s 2S1/2-4d 2D5/2 transition, and preliminary observations of the line shape are reported. An upper limit for the temperature of a single ion, derived from the 674-nm linewidth, was 200 mK. If non-Doppler sources of broadening such as unresolved Zeeman structure dominate, then the temperature limit would be even lower.