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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 9 — Apr. 26, 2010
  • pp: 9020–9025

Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient

Chandra S Yelleswarapu and Sri-Rajasekhar Kothapalli  »View Author Affiliations

Optics Express, Vol. 18, Issue 9, pp. 9020-9025 (2010)

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We report a novel photoacoustic Z-scan (PAZ-scan) technique that combines the advantages offered by the conventional Z-scan method and the sensitivity of the photoacoustic detection. The sample is scanned through the focused laser beam and the generated photoacoustic signal is recorded using a 10 MHz focused ultrasound transducer. Since the signal strength is directly proportional to the optical absorption, PAZ-scan displays nonlinear behavior depicting the nonlinear optical absorption of the material. Among many advantages, our experiments on mouse blood show that PAZ-scan can potentially be used as a standard technique to calibrate contrast agents used in theranostics in general and photoacoustics in particular.

© 2010 OSA

OCIS Codes
(170.5120) Medical optics and biotechnology : Photoacoustic imaging
(190.0190) Nonlinear optics : Nonlinear optics
(190.3270) Nonlinear optics : Kerr effect
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4870) Nonlinear optics : Photothermal effects

ToC Category:
Nonlinear Optics

Original Manuscript: February 24, 2010
Revised Manuscript: April 8, 2010
Manuscript Accepted: April 12, 2010
Published: April 14, 2010

Virtual Issues
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics

Chandra S Yelleswarapu and Sri-Rajasekhar Kothapalli, "Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient," Opt. Express 18, 9020-9025 (2010)

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