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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 34, Iss. 20 — Oct. 15, 2009
  • pp: 3071–3073

Faraday dichroic beam splitter for Raman light using an isotopically pure alkali-metal-vapor cell

Richard P. Abel, Ulrich Krohn, Paul Siddons, Ifan G. Hughes, and Charles S. Adams  »View Author Affiliations


Optics Letters, Vol. 34, Issue 20, pp. 3071-3073 (2009)
http://dx.doi.org/10.1364/OL.34.003071


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Abstract

We present an application of the Faraday effect to produce a narrowband dichroic beam splitter using an alkali metal vapor. Two Raman beams detuned in frequency by the ground-state hyperfine splitting in Rb 87 are produced using an electro-optic modulator and then separated using the Faraday effect in an isotopically pure Rb 85 thermal vapor. An experimental transmission spectra for the beam splitter is presented along with a theoretical calculation. The performance of the beam splitter is then demonstrated and characterized using a Fabry–Perot etalon. For a temperature of 70°C and a longitudinal magnetic field of 80 G, a suppression of one frequency of 18 dB is achieved, limited by the quality of the polarizers.

© 2009 Optical Society of America

OCIS Codes
(140.3550) Lasers and laser optics : Lasers, Raman
(230.2240) Optical devices : Faraday effect

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: April 30, 2009
Revised Manuscript: August 12, 2009
Manuscript Accepted: August 19, 2009
Published: October 5, 2009

Citation
Richard P. Abel, Ulrich Krohn, Paul Siddons, Ifan G. Hughes, and Charles S. Adams, "Faraday dichroic beam splitter for Raman light using an isotopically pure alkali-metal-vapor cell," Opt. Lett. 34, 3071-3073 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-20-3071


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