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Consistent characterization of semiconductor saturable absorber mirrors with single-pulse and pump-probe spectroscopy
R Fleischhaker1, N Krauss, F Schättiger
1Center for Applied Photonics and Department of Physics, University of Konstanz, Box M700, 78457 Konstanz, Germany. robert.fleischhaker@uni-konstanz.de
Abstract:
We study the comparability of the two most important measurement methods used for the characterization of semiconductor saturable absorber mirrors (SESAMs). For both methods, single-pulse spectroscopy (SPS) and pump-probe spectroscopy (PPS), we analyze in detail the time-dependent saturation dynamics inside a SESAM. Based on this analysis, we find that fluence-dependent PPS at complete spatial overlap and zero time delay is equivalent to SPS. We confirm our findings experimentally by comparing data from SPS and PPS of two samples. We show how to interpret this data consistently and we give explanations for possible deviations.
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