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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 19 — Jul. 1, 2011
  • pp: 3240–3245

Measurement of the two-photon absorption cross section by means of femtosecond thermal lensing

Luis Rodriguez and Matteo Chiesa  »View Author Affiliations


Applied Optics, Vol. 50, Issue 19, pp. 3240-3245 (2011)
http://dx.doi.org/10.1364/AO.50.003240


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Abstract

We present a variation of the single-beam thermal lensing experiment to determine the two-photon absorption cross sections of classical fluorophores. The approach is based on comparison of two thermal lensing signals simultaneously induced by a one- and two-photon absorption process from a high- repetition-rate femtosecond laser system. As a consequence of this comparison, a simplified expression independent of the several experimental parameters is obtained. Additionally, because of the low incident power levels required, undesirable optical effects such as Kerr or Raman scattering are avoided. Our experimental results agree well with those recently published for luminescent methods, validating the approach.

© 2011 Optical Society of America

OCIS Codes
(190.4180) Nonlinear optics : Multiphoton processes
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.4870) Nonlinear optics : Photothermal effects
(190.5940) Nonlinear optics : Self-action effects
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Nonlinear Optics

History
Original Manuscript: January 25, 2011
Revised Manuscript: May 9, 2011
Manuscript Accepted: May 15, 2011
Published: June 24, 2011

Citation
Luis Rodriguez and Matteo Chiesa, "Measurement of the two-photon absorption cross section by means of femtosecond thermal lensing," Appl. Opt. 50, 3240-3245 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-19-3240


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