Laser cooling of calcium ions by use of ultraviolet laser diodes: significant induction of electron-shelving transitions
Optics Letters, Vol. 26, Issue 23, pp. 1897-1899 (2001)
http://dx.doi.org/10.1364/OL.26.001897
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Abstract
Calcium ions are laser cooled in a Paul trap by use of a grating-stabilized UV laser diode. Unusual quantum jumps or fluctuations in the fluorescence signal are observed without application of any shelving lasers. It has become clear that such phenomena can be ascribed to shelving transitions induced by background 393-nm spontaneous photons emitted from the laser medium. Shelving transitions are suppressed by use of an interference filter, and the ions are successfully cooled to crystallization temperature with sufficient reproducibility.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6520) Spectroscopy : Spectroscopy, trapped ion
Citation
K. Toyoda, A. Miura, S. Urabe, K. Hayasaka, and M. Watanabe, "Laser cooling of calcium ions by use of ultraviolet laser diodes: significant induction of electron-shelving transitions," Opt. Lett. 26, 1897-1899 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-23-1897
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