Quantum Information Technology: Entanglement, Teleportation and Quantum Memory

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Efficient generation of tunable photon pairs at 0.8 and 1.6 µm
E. J. Mason, M. A. Albota, F. König, and F. N. C. Wong
Opt. Lett. 27 , 2115 (2002).



Abstract
We demonstrate efficient generation of collinearly propagating, highly nondegenerate photon pairs in a
periodically poled lithium niobate cw parametric downconverter with an inferred pair generation rate of 1.4 3
10^7/s/mW of pump power. Detection of an 800-nm signal photon triggers a thermoelectrically cooled 20%-
efficient InGaAs avalanche photodiode for the detection of the 1600-nm conjugate idler photon. Using
single-mode fibers as spatial mode filters, we obtain a signal-conditioned idler-detection probability of
~3.1%.


















 
     
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