Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen-Back regime

Optics Letters
Renju S MathewIfan G Hughes

Abstract

We demonstrate a technique to lock simultaneously two laser frequencies to each step of a two-photon transition in the presence of a magnetic field sufficiently large to gain access to the hyperfine Paschen-Back regime. A ladder configuration with the 5S1/2, 5P3/2, and 5D5/2 terms in a thermal vapor of Rb87 atoms is used. The two lasers remain locked for more than 24 h. For the sum of the laser frequencies, which represents the stability of the two-photon lock, we measure a frequency instability of less than the Rb D2 natural linewidth of 6 MHz for nearly all measured timescales.

References

Feb 15, 2008·Applied Optics·K L CorwinC E Wieman
Jan 4, 2012·Optics Letters·Christopher CarrKevin J Weatherill
Oct 8, 2013·Physical Review Letters·Bharath SrivathsanChristian Kurtsiefer
Sep 16, 2015·Optics Letters·Daniel J WhitingIfan G Hughes
Jul 12, 2017·Physical Review Letters·D J WhitingI G Hughes

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Citations

Nov 2, 2019·Optics Letters·Chloe SoCharles S Adams

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