Abstract
We demonstrate a two-window heterodyne method for measuring the cross correlation, , of an optical field for transverse position and transverse momentum . This scheme permits independent control of the and resolution. A simple linear transform of the correlation function yields the Wigner phase-space distribution. This technique is useful for both coherent and low-coherence light sources and may permit new biological imaging techniques based on transverse coherence measurement with time gating. We point out an interesting analogy between correlation measurements for classical-wave and quantum fields.
© 1999 Optical Society of America
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