On the measurement of photon flux in parametric down-conversion
Istituto Elettrotecnico Nazionale Galileo Ferraris, Strada delle Cacce 91,
10135 Torino, Italy
Revised: 2 August 1999
Published online: 15 February 2000
We report the measurement of the photons flux produced in parametric down-conversion, performed in photon counting regime with actively quenched silicon avalanche photodiodes as single photon detectors. Measurements are done with the detector in a well defined geometrical and spectral situation. By comparison of the experimental data with the theory, a value for the second order susceptibilities of the non linear crystal can be inferred.
PACS: 42.65.An – Optical susceptibility, hyperpolarizability
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000