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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 20 — Oct. 15, 2012
  • pp: 4254–4256

Lock-in detection of single photons after two-step frequency conversion

Andreas Lenhard, Sebastian Zaske, and Christoph Becher  »View Author Affiliations

Optics Letters, Vol. 37, Issue 20, pp. 4254-4256 (2012)

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We report on cascaded frequency conversion at the single-photon level, consisting of a downconversion from the red (738 nm) to a telecom band (1403 nm) and the reverse upconversion process in the same nonlinear crystal. Detecting the converted single photons suffers from a large noise floor. We were able to recover the signal by implementing a lock-in analyzer technique in the data postprocessing.

© 2012 Optical Society of America

OCIS Codes
(030.5260) Coherence and statistical optics : Photon counting
(190.4223) Nonlinear optics : Nonlinear wave mixing
(270.5565) Quantum optics : Quantum communications

ToC Category:
Coherence and Statistical Optics

Original Manuscript: July 18, 2012
Revised Manuscript: September 4, 2012
Manuscript Accepted: September 8, 2012
Published: October 9, 2012

Andreas Lenhard, Sebastian Zaske, and Christoph Becher, "Lock-in detection of single photons after two-step frequency conversion," Opt. Lett. 37, 4254-4256 (2012)

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Fig. 1. Fig. 2.

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