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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 13 — Jul. 1, 2004
  • pp: 1449–1451

Efficient single-photon counting at 1.55 μm by means of frequency upconversion

Marius A. Albota and Franco N. C. Wong  »View Author Affiliations


Optics Letters, Vol. 29, Issue 13, pp. 1449-1451 (2004)
http://dx.doi.org/10.1364/OL.29.001449


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Abstract

We demonstrate efficient single-photon detection at 1.55 μm by means of sum-frequency mixing with a strong pump at 1.064 μm in periodically poled lithium niobate followed by photon counting in the visible region. This scheme offers significant advantages over existing InGaAs photon counters: continuous-wave operation, higher detection efficiency, higher counting rates, and no afterpulsing. We achieved single-photon upconversion efficiency of 90% at 21.6 W of circulating power in a resonant pump cavity with a 400-mW Nd:YAG laser. We observed high background counts at strong circulating pump powers due to efficient upconversion of pump-induced fluorescence photons.

© 2004 Optical Society of America

OCIS Codes
(030.5260) Coherence and statistical optics : Photon counting
(270.0270) Quantum optics : Quantum optics
(270.5570) Quantum optics : Quantum detectors

Citation
Marius A. Albota and Franco N. C. Wong, "Efficient single-photon counting at 1.55 μm by means of frequency upconversion," Opt. Lett. 29, 1449-1451 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-13-1449

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