Two-photon spectroscopy and analysis with a white-light continuum probe

    Authors

    R. A. Negres; J. M. Hales; A. Kobyakov; D. J. Hagan;E. W. Van Stryland

    Comments

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    Abbreviated Journal Title

    Opt. Lett.

    Keywords

    2-PHOTON; Optics

    Abstract

    We present a powerful experimental tool and analysis for characterization of two-photon absorption (2PA) spectra. We demonstrate this method with ZnS and then apply it to organic dyes in solution. We also compare the results with those from other methods such as two-photon fluorescence spectroscopy. This femtosecond pump-probe method uses a white-light continuum (WLC) as the probe to produce a nondegenerate 2PA spectrum. The extreme chirp of the WLC requires that transmittance data be collected over a range of temporal delays between pump and probe pulses. These data then need to be corrected for the effects of this chirp as well as for the temporal walk-off of the pulses in the sample that result from the frequency nondegenerate nature of the experiment. We present a simple analytic solution for the transmitted fluence through the sample, which is applicable for most practical cases. (C) 2002 Optical Society of America.

    Journal Title

    Optics Letters

    Volume

    27

    Issue/Number

    4

    Publication Date

    1-1-2002

    Document Type

    Article

    Language

    English

    First Page

    270

    Last Page

    272

    WOS Identifier

    WOS:000173912800020

    ISSN

    0146-9592

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