Optical path-length spectroscopy of wave propagation in random media

G. Popescu, A. Dogariu

Research output: Contribution to journalArticlepeer-review


We propose optical path-length spectroscopy as a new approach to obtaining information from media that exhibit multiple light scattering. By using a backscattering technique based on low-coherence interferometry, we are able to determine the optical path-length distribution for light reflected from a random medium and to infer the value of the transport mean free path. We illustrate how a diffusion approximation model leads to a satisfactory description of depth-resolved profiles of the backscattered intensity and discuss potential applications of this technique.

Original languageEnglish (US)
Pages (from-to)442-444
Number of pages3
JournalOptics Letters
Issue number7
StatePublished - Apr 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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