Collinear source of polarization-entangled photon pairs at non-degenerate wavelengths

Pavel Trojek; Harald Weinfurter

doi:10.1063/1.2924280

Collinear source of polarization-entangled photon pairs at non-degenerate wavelengths

Quantum Physics 2009-11-13 v1

Authors: Pavel Trojek , Harald Weinfurter

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Abstract

We report on a simple but highly efficient source of polarization-entangled photon pairs at non-degenerate wavelengths. The fully collinear configuration of the source enables very high coupling efficiency into a single optical mode and allows the use of long nonlinear crystals. With optimized dispersion compensation it is possible to use a free-running laser diode as pump source and to reach an entanglement fidelity of 99.4 % at rates as high as 27000 pairs/s per mW of pump power. This greatly enhances the practicality of the source for applications in quantum communication and metrology.

Keywords

polarization-entangled photon pairs non-degenerate wavelengths collinear source dispersion compensation quantum communication entanglement fidelity nonlinear crystals

Cite

@article{arxiv.0804.3799,
  title  = {Collinear source of polarization-entangled photon pairs at non-degenerate wavelengths},
  author = {Pavel Trojek and Harald Weinfurter},
  journal= {arXiv preprint arXiv:0804.3799},
  year   = {2009}
}

Comments

4 pages, 4 figures, accepted in Applied Physics Letters

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