Broadband pumped polarization entangled photon-pair source in a linear beam displacement interferometer

Alexander Lohrmann; Chithrabhanu Perumangatt; Aitor Villar; Alexander Ling

doi:10.1063/1.5124416

Broadband pumped polarization entangled photon-pair source in a linear beam displacement interferometer

Quantum Physics 2020-01-29 v3

Authors: Alexander Lohrmann , Chithrabhanu Perumangatt , Aitor Villar , Alexander Ling

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Abstract

We experimentally demonstrate a source of polarization entangled photon-pairs based on a single periodically-poled potassium titanyl phosphate (PPKTP) crystal pumped with a broadband, free running laser diode.The crystal is placed within a linear beam-displacement interferometer, and emits photon-pairs based ontype-0 spontaneous parametric downconversion (SPDC). We observe pair rates of 0.56 Mpairs/s/mW in a single spatial mode with a polarization visibility of 97.7% over a spectral range of 100 nm. This experiment demonstrates a pathway towards observing Gigacount rates of polarization entangled photon pairs by using high-power free-running laser diodes with fast multiplexed detectors.

Keywords

photon pair generation polarization optics optical pumping

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@article{arxiv.1908.09568,
  title  = {Broadband pumped polarization entangled photon-pair source in a linear beam displacement interferometer},
  author = {Alexander Lohrmann and Chithrabhanu Perumangatt and Aitor Villar and Alexander Ling},
  journal= {arXiv preprint arXiv:1908.09568},
  year   = {2020}
}

Broadband pumped polarization entangled photon-pair source in a linear beam displacement interferometer

Abstract

Keywords

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