Measurement of photon correlations with multipixel photon counters

摘要

Development of reliable photon number resolving detectors (PNRD), deviceswhich are capable to distinguish 1,2,3.. photons, is of a great importance forquantum optics and its applications. A new class of affordable PNRD is based onmultipixel photon counters (MPPC). Here we review results of experiments onusing MPPCs for direct characterization of squeezed vacuum (SV) states,generated via parametric downconversion (PDC). We use MPPCs to measure thesecond order normalized intensity correlation function (g^(2)) and directlydetect the two-mode squeezing of SV states. We also present a method ofcalibration of crosstalk probability in MPPCs based on g^(2) measurements ofcoherent states.