Figure 3

(a) An example of spontaneous four wave mixing spectrum obtained with pulsed pumping (0.8 pJ per pulse), showing the generated signal and idler peaks and the full rejection of the pump. (b) Dependence of the number of generated photons per pulse on the pump’s energy per pulse. (c) Dependence of the generation rates on the pump power for the cw case. Dashed lines are guides to the eye proportional to the square of the pump energy per pulse (in panel (b)) and pump power (in panel (c)).