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.

4 pages, 3 figures

References in corpus (7)

• Absolute absorption on the rubidium D lines: comparison between theory and experiment
• ElecSus: A program to calculate the electric susceptibility of an atomic ensemble
• An optical isolator using an atomic vapor in the hyperfine Paschen-Back regime
• Slow-light Faraday effect: an atomic probe with gigahertz bandwidth
• Active Faraday optical frequency standards
• Off resonance laser frequency stabilization using the Faraday effect
• Atomic filtering for hybrid continuous-variable/discrete-variable quantum optics

Cited by in corpus (2)

• ElecSus: Extension to arbitrary geometry magneto-optics
• Tunable cavity-enhanced photon pairs source in Hermite-Gaussian mode