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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 1 — Jan. 1, 2010
  • pp: 22–24

Single-snapshot and intensity-resolved two-photon fluorescence measurements

J. Strohaber, M. P. Poudel, A. A. Kolomenskii, and H. A. Schuessler  »View Author Affiliations

Optics Letters, Vol. 35, Issue 1, pp. 22-24 (2010)

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We present a single-snapshot (SSS) method for obtaining intensity-resolved two-photon fluorescence (TPF). This simple method uses a digital camera to image the TPF spot on a liquid dye jet. By making a comparison between the local laser and TPF intensities, TPF probabilities are reconstructed. We compare our intensity-resolved TPF results with those obtained by the more common intensity scanning (IS) and z-scan methods. The dependence of the TPF probability on intensity obtained by the SSS method for coumarin-30 exhibits a clear maximum around I 4 × 10 12 W cm 2 and a postsaturation decrease, while no such effects were found in the data obtained by the other methods. Additionally, theoretical models are presented to extract the overall probability from within the volume integral. To our knowledge, we present the first reported measurements of such intensity-resolved TPF.

© 2009 Optical Society of America

OCIS Codes
(300.2530) Spectroscopy : Fluorescence, laser-induced
(320.2250) Ultrafast optics : Femtosecond phenomena
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:

Original Manuscript: September 16, 2009
Manuscript Accepted: October 30, 2009
Published: December 18, 2009

J. Strohaber, M. P. Poudel, A. A. Kolomenskii, and H. A. Schuessler, "Single-snapshot and intensity-resolved two-photon fluorescence measurements," Opt. Lett. 35, 22-24 (2010)

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