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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 7 — Jul. 1, 2008
  • pp: 1223–1230

Enhancement of laser radiation coupled into turbid media by using a unidirectional mirror

Pavel Matousek  »View Author Affiliations

JOSA B, Vol. 25, Issue 7, pp. 1223-1230 (2008)

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This article analyzes a simple method for the enhancement of laser radiation coupled into deep layers of turbid samples. This is accomplished by using a multilayer dielectric bandpass filter that acts as a unidirectional mirror and reflects photons re-emerging from the sample back into it. The research establishes a theoretical framework, and a very basic feasibility study is performed. In this study, laser intensity, delivered through a 14 mm slab of tissue, and a 3.9 mm pharmaceutical tablet were enhanced by factors of 1.6 and 3.8, respectively. Potential applications include photothermal and photodynamic cancer therapies of subsurface tissue, deep optical spectroscopy and imaging of biological tissue and powders, as well as thermal and optical subsurface treatment of powder materials, colloids, and catalysts.

© 2008 Optical Society of America

OCIS Codes
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.5180) Medical optics and biotechnology : Photodynamic therapy
(170.6510) Medical optics and biotechnology : Spectroscopy, tissue diagnostics
(290.1990) Scattering : Diffusion
(290.7050) Scattering : Turbid media
(350.3390) Other areas of optics : Laser materials processing

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: January 8, 2008
Revised Manuscript: April 17, 2008
Manuscript Accepted: April 21, 2008
Published: June 30, 2008

Virtual Issues
Vol. 3, Iss. 8 Virtual Journal for Biomedical Optics

Pavel Matousek, "Enhancement of laser radiation coupled into turbid media by using a unidirectional mirror," J. Opt. Soc. Am. B 25, 1223-1230 (2008)

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