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

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 5 , 5 , and 5 terms in a thermal vapor of 87 ato...

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Bibliographic Details
Published in:Optics letters 2018-09, Vol.43 (17), p.4204-4207
Main Authors: Mathew, Renju S, Ponciano-Ojeda, Francisco, Keaveney, James, Whiting, Daniel J, Hughes, Ifan G
Format: Article
Language:English
Subjects:
Frequency stability
Lasers
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Summary: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 5 , 5 , and 5 terms in a thermal vapor of 87 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 natural linewidth of 6 MHz for nearly all measured timescales.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.43.004204