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Schematic of the experimental setup. (a) A Michelson interferometer with different path lengths introduces a delay between two pulses. (b) A series of three Michelson interferometers generate a train of eight pulses. (c) Measured temporal distribution of the pulse train containing eight pulses. BS: Beam splitter; M: Mirror; B: Beam block. M2 and M3, M4 and M5 were slightly misaligned to avoid multiple back-reflections.
