Rb atomic absorption line reference for single Sr+ laser cooling systems |
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Authors: | AA Madej L Marmet JE Bernard |
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Institution: | (1) Institute for National Measurement Standards, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada (Fax: +1-613/952-5113, E-mail: alan.madej@nrc.ca), CA |
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Abstract: | 85 Rb, 5s2S1/2(F”=2)→6p2P1/2(F’=2,3) absorption resonance with the 88Sr+, 5s2S1/2→5p2P1/2 transition is exploited to provide a simple, effective frequency reference for a laser cooling/fluorescence excitation source
applied to single Sr+ ions. A modulation-free frequency stabilization system has been designed which uses the differential signal from two frequency-displaced
beams traversing a Rb cell and which probe the Doppler-broadened Rb S–P lineshape at microwatt power levels. The method is
applied to frequency lock a 422-nm frequency-doubled diode laser system that is used for excitation of a single 88Sr+ ion. Stable, long-term laser cooling and fluorescence are achieved using the frequency-stabilized 422-nm source resulting
in observed ion confinement times without adjustment of over 8 h, together with an improvement in single-ion loading efficiency.
Received: 12 February 1998 |
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Keywords: | PACS: 32 80 Pj 06 30 Ft 42 60 By |
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