Highly efficient single-photon detection at communication wavelengths by use of upconversion in reverse-proton-exchanged periodically poled LiNbO3 waveguides

Authors

Carsten Langrock, Eleni Diamanti, Rostislav V. Roussev, Hiroki Takesue, Yoshihisa Yamamoto, and M. M. Fejer

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 wave- lengths, based on guided-wave frequency upconversion in a nonlinear crystal with an overall system detection efficiency (upconversion + detection) exceeding 46% at 1.56 um. 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.

Journal

Optics Letters

Volume

30

Number

13

Date

07/2005
AttachmentSize
Langrock OL2005408.43 KB