MEASUREMENT OF NONCLASSICAL LIGHT

The theory of nonclassical light (NCL) is reviewed in relation to seco nd-order correlation functions. The differences between classical and nonclassical light and general properties of squeezed states are descr ibed. The theory of photon counting for interference between squeezed vacuum states and coherent states is analyzed. Homodyne and heterodyne detection is treated by dividing this method into four topics: (a) th e photocurrent spectrum measured by a photomultiplier and its relation to the properties of light; (b) spatial correlations obtained by two photomultipliers for NCL; (c) the influence of a beam splitter on phot on statistics; and (d) two-port homodyne detection, where the properti es of the second-order correlation functions are related to normal and anomalous first-order correlation functions. The general theory gives an original approach to the problem of a volume of quantization for N CL.