Atomic Faraday filter with equivalent noise bandwidth less than 1 GHz
Abstract
We demonstrate an atomic bandpass optical filter with an equivalent noise bandwidth less than 1 GHz using the D$_1$ line in a cesium vapor. We use the ElecSus computer program to find optimal experimental parameters, and find that for important quantities the cesium D$_1$ 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 gauss and a temperature of 68.0$\,^\circ$C. Experimentally, the prediction from the model is verified. The experiment and theoretical predictions show excellent agreement.
- Publication:
-
Optics Letters
- Pub Date:
- May 2015
- DOI:
- 10.1364/OL.40.002000
- arXiv:
- arXiv:1502.07187
- Bibcode:
- 2015OptL...40.2000Z
- Keywords:
-
- Physics - Atomic Physics;
- Physics - Optics
- E-Print:
- 4 pages, 3 figures