Open AccessZ-scan measurements using femtosecond continuum generation
Author(s) -
Leonardo De Boni,
Acácio A. Andrade,
Lino Misoguti,
Cleber Renato Mendonça,
Sérgio Carlos Zílio
Publication year - 2004
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.003921
Subject(s) - optics , femtosecond , z scan technique , materials science , wavelength , absorption (acoustics) , nonlinear optics , saturable absorption , absorption spectroscopy , two photon absorption , spectral line , laser , physics , fiber laser , astronomy
We present a single beam Z-scan technique using an intense, broadband, white-light continuum (WLC) beam for the direct measurement of nonlinear absorption spectra. In order to demonstrate the validity of our technique, we compared the results of tetraaniline and Sudan 3 solutions obtained with WLC and conventional single wavelength light sources. Both approaches lead to the same nonlinear spectrum, indicating that the association of the Z-scan technique and the WLC source results in an useful method for the measurement of nonlinear spectra of both absorbing (saturable absorption or reverse saturable absorption) and transparent (two-photon absorption) samples.