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Proceedings Paper

Observation of Zeeman shift in the rubidium D2 line using an optical nanofiber in vapor
Author(s): Amy Watkins; Vibhuti Bhushan Tiwari; Jonathan M. Ward; Kieran Deasy; Síle Nic Chormaic
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Paper Abstract

We report on the observation of a Zeeman shift (order of 100 MHz) of the Doppler-broadened D2 transition of both 85Rb and 87Rb isotopes via transmission through a 400 nm diameter optical nanofiber in the presence of a DC magnetic field. Linearly-polarized light propagating in the nanofiber is analyzed as a superposition of two orthogonally circularly polarized orientations, σ+ and σ-. In the absence of the magnetic field, the absorption of these polarizations by the atomic vapor, via the evanescent field at the waist of the nanofiber, is degenerate. When a weak magnetic field is applied parallel to the propagating light, this degeneracy is lifted and relative shifts in the resonance frequencies are detected. Typical linear shift rates of 1.6 MHz/G and -2.0 MHz/G were observed. We also demonstrate a dichroic atomic vapor laser lock line shape by monitoring the real-time subtraction of the two magnetically-shifted absorption spectra. This is particularly interesting for magneto-optical experiments as it could be directly implemented for diode laser frequencystabilization.

Paper Details

Date Published: 18 November 2013
PDF: 6 pages
Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 87850S (18 November 2013); doi: 10.1117/12.2027163
Show Author Affiliations
Amy Watkins, Univ. College Cork (Ireland)
Vibhuti Bhushan Tiwari, Ctr. for Advanced Technology (India)
Jonathan M. Ward, Okinawa Institute of Science and Technology (Japan)
Kieran Deasy, Okinawa Institute of Science and Technology (Japan)
Síle Nic Chormaic, Univ. College Cork (Ireland)
Okinawa Institute of Science and Technology (Japan)
Univ. of KwaZulu-Natal (South Africa)

Published in SPIE Proceedings Vol. 8785:
8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications
Manuel Filipe P. C. Martins Costa, Editor(s)

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