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Atomic Faraday filter with equivalent noise bandwidth less than 1 GHz.

Zentile, M. A. and Whiting, D. J. and Keaveney, J. and Adams, C. S. and Hughes, I. G. (2015) 'Atomic Faraday filter with equivalent noise bandwidth less than 1 GHz.', Optics letters., 40 (9). pp. 2000-2003.


We demonstrate an atomic bandpass optical filter with an equivalent noise bandwidth less than 1 GHz using the D1 line in a cesium vapor. We use the ElecSus computer program to find optimal experimental parameters and find that, for important quantities, the cesium D1 line clearly outperforms other alkali metals on either D-lines. The filter simultaneously achieves a peak transmission of 77%, a passband of 310 MHz, and an equivalent noise bandwidth of 0.96 GHz, for a magnetic field of 45.3 G and a temperature of 68.0°C. Experimentally, the prediction from the model is verified. The experiment and theoretical predictions show excellent agreement.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Publisher statement:© 2015 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
Date accepted:23 March 2015
Date deposited:08 March 2016
Date of first online publication:24 April 2015
Date first made open access:24 April 2016

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