Development of an ultranarrow diode laser for interrogating the 674-nm 2S1/2-2D5/2 clock transition in Sr+

Geoffrey P. Barwood; K. Gao; Patrick Gill; G. Huang; H. A. Klein

doi:10.1117/12.424463

3 May 2001 Development of an ultranarrow diode laser for interrogating the 674-nm ²S_1/2-²D_5/2 clock transition in Sr⁺

Geoffrey P. Barwood, K. Gao, Patrick Gill, G. Huang, H. A. Klein

Proceedings Volume 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications; (2001) https://doi.org/10.1117/12.424463
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

Abstract

An optical frequency standard, based on the 674 nm ²S_1/2-²D_5/2 '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 ²S_1/2 - ²D_5/2 Zeeman multiplet in any two of the three traps, allowing a comparison between them. Recent results on this comparison are presented.

Citation Download Citation

Geoffrey P. Barwood, K. Gao, Patrick Gill, G. Huang, and H. A. Klein "Development of an ultranarrow diode laser for interrogating the 674-nm ²S_1/2-²D_5/2 clock transition in Sr⁺", Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); https://doi.org/10.1117/12.424463

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