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    • Phase-stable source of polarization-entangled photons in a linear double-pass configuration 

      Steinlechner, F.; Ramelow, Sven; Jofre, Martí; Gilaberte, Marta; Jennewein, Thomas; Pérez Torres, Juan; Mitchell, Morgan W.; Pruneri, Valerio (2013-05)
      Open Access
      We demonstrate a compact, robust, and highly efficient source of polarization-entangled photons, based on linear bi-directional down-conversion in a novel ‘folded sandwich’ configuration. Bi-directionally pumping a single ...