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Proceedings Paper

Doppler-free mid-infrared spectroscopy and direct frequency measurement of a single barium ion transition using a frequency stable ammonia laser
Author(s): Alan A. Madej; B. G. Whitford; K. J. Siemsen; J. D. Sankey
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Paper Abstract

The 24.0 THz dipole forbidden, 5d2D3/2 - 5d2D5/2 fine structure transition in a single, trapped, and laser cooled 138Ba+ atom was probed with a tunable sideband from an optically pumped 15NH3 laser. Narrow resonances were observed which showed each Zeeman component to be free of first order and time dilation Doppler effects. Weak motional sidebands were observed adjacent to the central carrier yielding an estimated ion motional temperature below 15 mK. The ammonia laser was stabilized to its sP(8,6) saturated absorption dip, and measurements of the laser output frequency were made with the NRC frequency chain phase-locked to a primary Cs standard. Scanning of the Ba+ D-D resonance with an electro-optically produced sideband of NH3 laser radiation gave a direct measurement of the single ion center frequency. The preliminary series of measurements yielded 24 012 048 309 +/- 17 kHz for the 138Ba+ D-D transition center frequency.

Paper Details

Date Published: 30 April 1993
PDF: 9 pages
Proc. SPIE 1837, Frequency-Stabilized Lasers and Their Applications, (30 April 1993); doi: 10.1117/12.143690
Show Author Affiliations
Alan A. Madej, National Research Council Canada (Canada)
B. G. Whitford, National Research Council Canada (Canada)
K. J. Siemsen, National Research Council Canada (Canada)
J. D. Sankey, National Research Council Canada (Canada)

Published in SPIE Proceedings Vol. 1837:
Frequency-Stabilized Lasers and Their Applications
Y. C. Chung, Editor(s)

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