Journal
OPTICS EXPRESS
Volume 18, Issue 2, Pages 1613-1617Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.001613
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Most time-resolved optical experiments rely either on external mechanical delay lines or on two synchronized femtosecond lasers to achieve a defined temporal delay between two optical pulses. Here, we present a new method which does not require any external delay lines and uses only a single femtosecond laser. It is based on the cross-correlation of an optical pulse with a subsequent pulse from the same laser. Temporal delay between these two pulses is achieved by varying the repetition rate of the laser. We validate the new scheme by a comparison with a cross-correlation measurement carried out with a conventional mechanical delay line. (C) 2010 Optical Society of America
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