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arXiv · 2111.06076

Birefringent atomic vapor laser lock in a hollow cathode lamp

Takumi Sato·Yusuke Hayakawa·Naohiro Okamoto·Yusuke Shimomura·Takatoshi Aoki·Yoshio Torii
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Abstract

We report a robust method of stabilizing a laser to the frequency of an atomic transition using a hollow cathode lamp. In contrast to the standard dichroic atomic vapor laser lock (DAVLL) method, which uses dichroism induced by a longitudinal magnetic field, we employ birefringence induced by a transversal magnetic field. We applied this method to the $(5s^2)\ {}^{1}S_{0} - (5s5p)\ {}^{1}P_{1}$ transition (461 nm) of Sr. Although the hollow cathode is made of ferromagnetic material, we successfully applied a magnetic field of sufficient strength to obtain an error signal with a theoretical maximum slope. This method may be applied to other hollow cathode lamps of different atomic species.

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Takumi Sato, Yusuke Hayakawa, Naohiro Okamoto, Yusuke Shimomura, Takatoshi Aoki, Yoshio Torii. 2021-11-11. Birefringent atomic vapor laser lock in a hollow cathode lamp. https://doi.org/10.1364/josab.442465

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