deletions | additions       diff --git a/section_Experimental_results_We_configure__.tex b/section_Experimental_results_We_configure__.tex  index 460cda6..e20ae65 100644  --- a/section_Experimental_results_We_configure__.tex  +++ b/section_Experimental_results_We_configure__.tex 
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We configure the pump fields to be aligned to the ITU telecomunication grid, ($\lambda_1 = 1551.7$ nm and $\lambda_2 = 1551.82$ nm), modulated to 1-ns-long pulses at $1 $ MHz repetition rate. Scanning the input signal wavelength while monitoring the depletion of the signal, we observe perfect phasematching for $λ_s = 1284.45(5)$ nm. % and $λ_i = 1279.28(5)$ nm.  We tune our CW source at $λ_s$, attenuated to a count rate of about $3$ kcps per temporal bin ($166$ ps), and by recording, separately, the depletion of the signal and the gain of the idler, we measure the conversion efficiency $\eta$ as the total pump power varies, while keeping the two pumps balanced and the polarization aligned, as shown in figure \ref{fig:vs_power}.  Our setup reaches conversion efficiency of $99.4$ \% over a $0.6$ ns window ($\vert\alpha\vert^2 \simeq .15$ 0.15$  at input of the nonlinear fiber). For high values of $P$, $\eta$ peaks and the decreases, but conversion deviates from the expected sinusoidal model because higher(cascaded) order frequency conversion start taking place. In figure \ref{fig:vs_power}(b) we show the measurement taken using the DCM to spectrally separate the fields, showing the evolution of the second order signal $\omega_{sII} = \omega_s - \Delta\omega$ and idler $\omega_{iII} = \omega_i + \Delta\omega$. We tune the single photon source and filters to heralded the presence of photons at $λ_s$ into the BS setup. The heralding rate is about $200$ KHz for a detected pair rate of $~6000$ cps. Pumps can indeed be triggered to be generated on the event of a heralded photons, but the conversion efficiency is technically limited by the amplitude fluctuations introduced by the EDFA due to the random time between each pulse. To overcome this limitation, we let the system run independently in condition similar to the classical measurement, and we record the three-fold coincidences between signal, herald and pump: in this condition the detected pair rate is $~20$ pairs/s in a 0.6-nanosecond window. We show the results figure \ref{fig:vs_power}, where we observe a conversion efficiency of ?.  Unitary conversion efficiency is limited by the fact that single photon bandwidth ( $\delta \lambda =0.57$ nm FWHM) and the acceptance ( $\delta \lambda_{BS} = 1.17(2)$ nm FWHM) are comparable: theoretical calculation show a maximum efficiency $\eta$ of about $89\%$.