Large efficiency at telecom wavelength for optical quantum memories.

@article{Dajczgewand2014LargeEA,
  title={Large efficiency at telecom wavelength for optical quantum memories.},
  author={Juli{\'a}n Dajczgewand and J.-L. Le Gou{\"e}t and Anne Louchet-Chauvet and Thierry Chaneli{\`e}re},
  journal={Optics letters},
  year={2014},
  volume={39 9},
  pages={
          2711-4
        }
}
We implement the ROSE protocol in an erbium-doped solid, compatible with the telecom range. The ROSE scheme is an adaptation of the standard two-pulse photon echo to make it suitable for a quantum memory. We observe a retrieval efficiency of 40% for a weak laser pulse in the forward direction by using specific orientations of the light polarizations, magnetic field, and crystal axes. 

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