On the basis of space–time duality, we propose experimental setups
to implement the cross-ambiguity function optically in space and time
in one and two dimensions. In space the cross-ambiguity is shown to
be related to the coupling efficiency between butt-joined optical
waveguides. In time it is related to the spectrogram or the
frequency-resolved optical gating techniques for the characterization
of optical pulses.
© 1999 Optical Society of America
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