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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 20, Iss. 4 — Apr. 1, 2003
  • pp: 678–685

Definition of the diffusion coefficient in scattering and absorbing media

Rachid Elaloufi, Rémi Carminati, and Jean-Jacques Greffet  »View Author Affiliations

JOSA A, Vol. 20, Issue 4, pp. 678-685 (2003)

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We revisit the definition of the diffusion coefficient for light transport in scattering and absorbing media. From an asymptotic analysis of the transport equation, we present a novel derivation of the diffusion coefficient, which is restricted neither to low absorption nor to a situation in which the specific intensity is quasi-isotropic. Our result agrees with previous expressions of the diffusion coefficient in the appropriate limit. Using numerical simulations, we discuss the implications of the proper choice of the diffusion coefficient for time-dependent transport.

© 2003 Optical Society of America

OCIS Codes
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.5280) Medical optics and biotechnology : Photon migration
(290.1990) Scattering : Diffusion
(290.4210) Scattering : Multiple scattering
(290.7050) Scattering : Turbid media

Original Manuscript: May 28, 2002
Revised Manuscript: November 11, 2002
Manuscript Accepted: November 11, 2002
Published: April 1, 2003

Rachid Elaloufi, Rémi Carminati, and Jean-Jacques Greffet, "Definition of the diffusion coefficient in scattering and absorbing media," J. Opt. Soc. Am. A 20, 678-685 (2003)

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