Figure 9

Pulse-height spectra for a coherent state obtained with the system slow amplifier+DRS4 obtained either by selecting the peak value or integrating the rising edge of the signal over different integration widths as displayed in the figure panels. The mean value of the detected coherent state is \(\langle x_{\text{out}}\rangle /\bar{\gamma }\sim 3.6\). The corresponding visibility values are \(v = 0.82 \pm 0.06\) for the peak value, \(v = 0.82 \pm 0.06\) for \(\tau = 2\mbox{ ns}\), \(v = 0.75 \pm 0.08\) for \(\tau = 10\mbox{ ns}\), and \(v = 0.57 \pm 0.11\) for \(\tau = 18\mbox{ ns}\)