An optical isolator using an atomic vapor in the hyperfine Paschen-Back   regime
  A light, compact optical isolator using an atomic vapor in the hyperfine Paschen-Back regime is presented. Absolute transmission spectra for experiment and theory through an isotopically pure 87Rb vapor cell show excellent agreement for fields of 0.6 T. We show \pi/4 rotation for a linearly polarized beam in the vicinity of the D2 line and achieve an isolation of 30 dB with a transmission > 95 %. 
L. Weller, K. S. Kleinbach, M. A. Zentile, S. Knappe, I. G. Hughes and   C. S. Adams
physics.atom-ph