Ultrastable laser system for spectroscopy of the 1S0-3P0 clock transition in Sr atoms

A laser system with a spectral linewidth less than 1 Hz for spectroscopy of the 1S0-3P0 clock transition in strontium atoms has been demonstrated. A semiconductor laser emitting at a wavelength of 698 nm was stabilised to an external high-finesse Fabry-Perot cavity with vibration and temperature com...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2017-06, Vol.47 (5), p.400-405
Main Authors: Berdasov, O.I., Gribov, A.Yu, Belotelov, G.S., Pal'chikov, V.G., Strelkin, S.A., Khabarova, K.Yu, Kolachevsky, N.N., Slyusarev, S.N.
Format: Article
Language:English
Subjects:
Laser cooling
Lasers
Optical lattices
Q factors
Semiconductor lasers
Spectrum analysis
Strontium 88
Temperature compensation
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Summary:A laser system with a spectral linewidth less than 1 Hz for spectroscopy of the 1S0-3P0 clock transition in strontium atoms has been demonstrated. A semiconductor laser emitting at a wavelength of 698 nm was stabilised to an external high-finesse Fabry-Perot cavity with vibration and temperature compensation near the zero expansion point. After laser cooling to a temperature below 3 μK, 88Sr atoms were loaded into an optical lattice at a magic wavelength of 813 nm. The laser system was used to characterise the 88Sr clock transition by magnetically induced spectroscopy. The resonance spectral width was determined to be 130 ± 17 Hz, which corresponds to a quality factor of 3 × 1012.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL16346