We have measured the probability distribution of the phase difference ϕ2 − ϕ1 between two signal fields produced by parametric downconversion from two cascaded nonlinear crystals for several different values of the degree of mutual coherence. The experimental results are compared with theory, based on our operational approach to phase operators for quantum fields, and good agreement is obtained. These results are of interest because they constitute what we believe is the first experimental test of our phase theory for nonclassical states of light.
© 1994 Optical Society of America
Original Manuscript: May 5, 1994
Published: November 1, 1994
A. Fougères, C. H. Monken, and L. Mandel, "Measurements of the probability distribution of the phase difference between two quantum fields," Opt. Lett. 19, 1771-1773 (1994)