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title = {{Optimizing optical Bragg scattering for single-photon frequency conversion}},  journal = {Phys. Rev. A},  }  @article{Albota_2004,  doi = {10.1364/ol.29.001449},  url = {http://dx.doi.org/10.1364/ol.29.001449},  year = {2004},  month = {jul},  publisher = {The Optical Society},  volume = {29},  number = {13},  pages = {1449},  author = {Marius A. Albota and Franco N. C. Wong},  title = {{Efficient single-photon counting at 155 $\mathrm{\mu}$m by means of frequency upconversion}},  journal = {Optics Letters},  }