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Opt Lett. 2006 Mar 15;31(6):757-9. doi: 10.1364/ol.31.000757.

Laser cooling of trapped ytterbium ions with an ultraviolet diode laser.

Optics letters

D Kielpinski, M Cetina, J A Cox, F X Kärtner

Affiliations

  1. Center for Ultracold Atoms and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. [email protected]

PMID: 16544614 DOI: 10.1364/ol.31.000757

Abstract

We demonstrate an ultraviolet diode laser system for cooling of trapped ytterbium ions. The laser power and linewidth are comparable to those of previous systems based on resonant frequency doubling, but the system is simpler, more robust, and less expensive. We use the laser system to cool small numbers of ytterbium ions confined in a linear Paul trap. From the observed spectra, we deduce final temperatures of < 270 mK.

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