We present the reconstruction of the Wigner function of some classical pulsed optical states obtained by direct measurement of the detected-photon probability distributions of the state displaced by a coherent field. We use a photodetector endowed with internal gain, which is operated in the non-photon-resolving regime. The measurements are performed up to mesoscopic intensities (up to more than 30 photons per pulse). The method can be applied to characterize nonclassical continuous-variable states.
© 2009 Optical Society of America
Original Manuscript: March 9, 2009
Manuscript Accepted: March 23, 2009
Published: April 29, 2009
Maria Bondani, Alessia Allevi, and Alessandra Andreoni, "Wigner function of pulsed fields by direct detection," Opt. Lett. 34, 1444-1446 (2009)