= Z. Y. Ou
{c}
{tag=Physicist}
An experimental <optical physicist> who coauthored the 1987 <Hong-Ou-Mandel effect> experiment. The team varied the relative arrival time of a <photon> pair at a <beam splitter> and counted coincidences. A narrow interference feature revealed subpicosecond timing information, converting a time scale too short for direct electronic timing into a path-delay measurement.<Measurement of Subpicosecond Time Intervals between Two Photons by Interference by C. K. Hong and others>[Abstract and experimental arrangement: down-converted pairs and relative-delay interference]{ref}
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