  We present a novel method of calibration of crosstalk probability for
multi-pixel photon counters (MPPCs) based on the measurement of the normalized
second-order intensity correlation function of coherent light. The method was
tested for several MPPCs, and was shown to be advantageous over the traditional
calibration method based on the measurements of the dark noise statistics. The
method can be applied without the need of modification for different kinds of
spatially resolved single photon detectors.
