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Optics Letters

Optics Letters


  • Vol. 29, Iss. 16 — Aug. 13, 2004
  • pp: 1906–1908

Coherent backscattering spectroscopy

Young L. Kim, Yang Liu, Vladimir M. Turzhitsky, Hemant K. Roy, Ramesh K. Wali, and Vadim Backman  »View Author Affiliations

Optics Letters, Vol. 29, Issue 16, pp. 1906-1908 (2004)

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Coherent backscattering (CBS) of light in random media has been previously investigated by use of coherent light sources. Here we report a novel method of CBS measurement that combines low spatial coherence, broadband illumination, and spectrally resolved detection. We show that low spatial coherence illumination leads to an anomalously broad CBS peak and a dramatic speckle reduction; the latter is further facilitated by low temporal coherence detection. Thus CBS can be observed in biological tissue and other media that previously were beyond the reach of conventional CBS measurements. We also demonstrate, for the first time to our knowledge, spectroscopic analysis of CBS.CBS spectroscopy may find important applications in probing random media such as biological tissue in which depth-selective measurements are crucial.

© 2004 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(290.1350) Scattering : Backscattering
(300.6170) Spectroscopy : Spectra

Young L. Kim, Yang Liu, Vladimir M. Turzhitsky, Hemant K. Roy, Ramesh K. Wali, and Vadim Backman, "Coherent backscattering spectroscopy," Opt. Lett. 29, 1906-1908 (2004)

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