Fig. 1 | Light: Science & Applications

Fig. 1

From: NOON-state interference in the frequency domain

Fig. 1

Schematic diagram. a Traditional NOON-state interference (N = 2) scheme in the spatial domain. b BS-FWM frequency diagram. fxx (\({\rm{xx}}={\rm{p}}1,{\rm{p}}2,{\rm{s}},{\rm{i}},{\rm{ZGVD}}\)) indicates the frequencies of two pump fields, signal photon, idler photon, and the zero-group-velocity dispersion (ZGVD) of a nonlinear medium, respectively. c Schematic diagram of a frequency beam splitter through the BS-FWM process with two pump fields, an input photon, and a target photon. FBS frequency beam splitter. d Proposed NOON-state interference scheme in the frequency domain

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