Abstract
We present a frequency-stable diode-pumped Nd:YAG laser used for ultra high resolution spectroscopy of In+. A single laser-cooled Indium ion, stored in a radio-frequency trap, is a promising candidate for an optical frequency standards with an anticipated accuracy of up to 10–18. On the way to achieve such a high level of accuracy one of the main limitations is the short-term frequency instability of the Nd:YAG laser, used to excite the narrow 5s2 1S0 - 5s5p 3P0 transition in In+. Since the signal from the single ion is small, the laser system should posses extremely high frequency stability (on the level of 10–14 - 10–15) for averaging times of up to 20 seconds.
© 2001 EPS
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