Abstract
The complementarity relation between the spectral distinguishability of frequency-shifted photonic wave packets in a Hong–Ou–Mandel interferometer and the resulting interferogram’s visibility is studied. Experimental definition of , the distinguishability parameter, and , the interferogram’s single-photon visibility, is proposed and tested for the complementarity inequality. The results show that the spectral distinguishability is, indeed, complementary to the visibility and that the quantum aspect of the two-photon interference phenomenon can be examined by employing weak coherent states.
© 2018 Optical Society of America
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