Development and comparison of models for light-pulse transport through scattering-absorbing media

Kunal Mitra, Sunil Kumar

Research output: Contribution to journalArticle

Abstract

We examine the transport of short light pulses through scattering-absorbing media through different approximate mathematical models. It is demonstrated that the predicted optical signal characteristics are significantly influenced by the various models considered, such as PN expansion, two-flux, and discrete ordinales. The effective propagation speed of the scattered radiation, the predicted magnitudes of the transmitted and backscattered fluxes, and the temporal shape and spread of the optical signals are functions of the models used to represent the intensity distributions. A computationally intensive direct numerical integration scheme that does not utilize approximations is also implemented for comparison. Results of some of the models asymptotically approach those of direct numerical simulation if the order of approximation is increased. In this study therefore we identify the importance of model selection in analyzing short-pulse laser applications such as optical tomography and remote sensing and highlight the parameters, such as wave speed, that must be examined before a model is adopted for analysis.

Original languageEnglish (US)
Pages (from-to)188-196
Number of pages9
JournalApplied Optics
Volume38
Issue number1
StatePublished - 1999

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Scattering
pulses
scattering
optical communication
Fluxes
Laser applications
laser applications
Optical tomography
Direct numerical simulation
approximation
numerical integration
direct numerical simulation
remote sensing
Remote sensing
Laser pulses
mathematical models
tomography
Mathematical models
Radiation
expansion

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Development and comparison of models for light-pulse transport through scattering-absorbing media. / Mitra, Kunal; Kumar, Sunil.

In: Applied Optics, Vol. 38, No. 1, 1999, p. 188-196.

Research output: Contribution to journalArticle

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