Experimental Improvement of Signal of a Single Laser-Cooled Trapped 40 Ca + Ion
Shu Hua-Lin, Bin Guo, Guan Hua, Liu Qu, Huang Xue-Ren, Kelin Gao · Chinese Physics Letters · 2007
A single 40 Ca + ion is loaded in a miniature Paul trap and the probability of directly loading a single ion is above 50%. The signal-to-noise ratio and the storage time for a single ion have been improved by minimizing the ion micromotion and locking a 397 nm cooling laser to a Fabry–Perot interferometer and optogalvanic signal. From the fluorescence spectrum, the ion temperature is estimated to be about 5 mK.