https://doi.org/10.1140/epjd/s10053-024-00831-9
Regular Article - Optical Phenomena and Photonics
Direct spectroscopy of Rubidium using a narrow-line transition at 420 nm
Department of Physics, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India
Received:
30
January
2024
Accepted:
19
March
2024
Published online:
4
April
2024
The 5S
6P transition in rubidium (Rb) at 420 nm offers the advantage of narrow linewidth and diverse applications in quantum technologies. However, the direct spectroscopy at this transition is challenging due to its weak transition strength. In this paper, we have discussed the saturated absorption spectroscopy (SAS) of Rb using the narrow-line transition at 420 nm. We have studied the effect of the temperature of the Rb cell, control beam power, and beam size on the SAS dip heights and their linewidths. Additionally, our study offers a comprehensive examination, encompassing all eight error signals of Rb for the 5 S6P transition at 420 nm and 421 nm. These findings contribute valuable insights to the field of laser frequency stabilization of Rb at blue transition and can be useful in quantum technologies based on this transition.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
