Highly efficient single-photon detection at communication wavelengths by use of upconversion in reverse-proton-exchanged periodically poled LiNbO3 waveguides
Optics Letters, Vol. 30, Issue 13, pp. 1725-1727 (2005)
http://dx.doi.org/10.1364/OL.30.001725
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Abstract
Conventional single-photon detectors at communication wavelengths suffer from low quantum efficiencies and large dark counts. We present a single-photon detection system, operating at communication wavelengths, based on guided-wave frequency upconversion in a nonlinear crystal with an overall system detection efficiency (upconversion + detection) exceeding 46% at 1.56 µm. This system consists of a fiber-pigtailed reverse-proton-exchanged periodically poled LiNbO3 waveguide device in conjunction with a silicon-based single-photon counting module.
© 2005 Optical Society of America
OCIS Codes
(040.5570) Detectors : Quantum detectors
(190.7220) Nonlinear optics : Upconversion
Citation
Carsten Langrock, Eleni Diamanti, Rostislav V. Roussev, Yoshihisa Yamamoto, M. M. Fejer, and Hiroki Takesue, "Highly efficient single-photon detection at communication wavelengths by use of upconversion in reverse-proton-exchanged periodically poled LiNbO3 waveguides," Opt. Lett. 30, 1725-1727 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-13-1725
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