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Proceedings Paper

Development of an ultranarrow diode laser for interrogating the 674-nm 2S1/2-2D5/2 clock transition in Sr+
Author(s): Geoffrey P. Barwood; K. Gao; Patrick Gill; G. Huang; H. A. Klein
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Paper Abstract

An optical frequency standard, based on the 674 nm 2S1/2-2D5/2 'clock' transition in a laser cooled trapped strontium ion is currently being evaluated at the UK National Physical Laboratory. The probe laser is a narrowed AlGaInP diode laser locked to a highly-stable and ultra-low- expansion high-finesse cavity. Laser linewidths of less than 200 Hz have been observed, measured by scanning over a single Zeeman component at 674 nm. The development of this laser is described, together with factors currently limiting the observed linewidth. Three 88Sr+ traps are now in operation, and the probe laser source can be simultaneously locked to the center of the 2S1/2 - 2D5/2 Zeeman multiplet in any two of the three traps, allowing a comparison between them. Recent results on this comparison are presented.

Paper Details

Date Published: 3 May 2001
PDF: 9 pages
Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); doi: 10.1117/12.424463
Show Author Affiliations
Geoffrey P. Barwood, National Physical Lab. (United Kingdom)
K. Gao, Wuhan Institute of Physics and Mathematics (China)
Patrick Gill, National Physical Lab. (United Kingdom)
G. Huang, National Physical Lab. (United Kingdom)
H. A. Klein, National Physical Lab. (United Kingdom)

Published in SPIE Proceedings Vol. 4269:
Laser Frequency Stabilization, Standards, Measurement, and Applications
John L. Hall; Jun Ye, Editor(s)

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