Abstract
Mode-locked femtosecond (fs) lasers have become established as a means to probe fast transient phenomena, with pump-probe experiments using two mode-locked fs-lasers with slightly different repetition rates becoming widespread [1,2]. In these experiments, the time delay between the pump and the probe laser pulses is automatically scanned at the difference frequency between the repetition rates. Such technique, also called asynchronous optical sampling, has been recently exploited in the THz frequency range, to probe broadband THz pulses generated with non-linear optics [3-5].
© 2011 Optical Society of America
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