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15 October 2012 Dual-channel, single-photon upconversion detector near 1300 nm
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Upconversion of 1.3-micron photons and detection using silicon avalanche photodiodes (Si APDs) can produce high photon detection efficiencies (PDEs) with low dark count rates. We demonstrate a novel two-channel device based on a phase-modulated, periodically poled LiNbO3 waveguide that mixes 1302-nm signal photons with two pump beams at 1556 and 1571 nm. Both channels showed high PDEs with very low dark counts. Using wavelength- to time-division multiplexing in this dual-channel device, we produced clock rates that exceed the timing-jitter-limited rates of a system based on one Si APD. Higher clock rates are of interest for improved quantum communication systems.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paulina S. Kuo, Jason S. Pelc, Oliver Slattery, Martin M. Fejer, and Xiao Tang "Dual-channel, single-photon upconversion detector near 1300 nm", Proc. SPIE 8518, Quantum Communications and Quantum Imaging X, 85180U (15 October 2012);

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