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(a) Phase-matching curve for PPLN waveguide, dots—data; solid curve—least square fitting. (b) Temperature tuning curve, dots—data; solid curve—theory.
(a) Dots—internal conversion efficiency vs. pump power at 980 nm under different operating temperatures; solid curves—theoretical fit using square of sinusoidal dependence. (b) Dots—signal photon rate vs. detected photon rate at different pump levels; solid lines—linear least-square fit.
Red solid curve—pump is turned on and signal is turned off; black solid curve—signal is turned on.
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