Doppler-free mid-infrared spectroscopy and direct frequency measurement of a single barium ion transition using a frequency stable ammonia laser

Alan A. Madej; B. G. Whitford; K. J. Siemsen; J. D. Sankey

doi:10.1117/12.143690

30 April 1993 Doppler-free mid-infrared spectroscopy and direct frequency measurement of a single barium ion transition using a frequency stable ammonia laser

Alan A. Madej, B. G. Whitford, K. J. Siemsen, J. D. Sankey

Author Affiliations +

Proceedings Volume 1837, Frequency-Stabilized Lasers and Their Applications; (1993) https://doi.org/10.1117/12.143690
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

The 24.0 THz dipole forbidden, 5d²D_3/2 - 5d²D_5/2 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.

Citation Download Citation

Alan A. Madej, B. G. Whitford, K. J. Siemsen, and J. D. Sankey "Doppler-free mid-infrared spectroscopy and direct frequency measurement of a single barium ion transition using a frequency stable ammonia laser", Proc. SPIE 1837, Frequency-Stabilized Lasers and Their Applications, (30 April 1993); https://doi.org/10.1117/12.143690

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