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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 3, Iss. 6 — Jun. 17, 2008

Measurement of diffuse photon-pairs density wave in a multiple-scattering medium

Li-Ping Yu, Chien Chou, Jheng-Syong Wu, and Yi-Hsin Chan  »View Author Affiliations


Applied Optics, Vol. 47, Issue 14, pp. 2708-2714 (2008)
http://dx.doi.org/10.1364/AO.47.002708


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Abstract

As a continuation of the previously developed theory of a diffuse photon-pairs density wave (DPPDW) [ Appl. Opt. 44, 1416–1425 (2005)], this research experimentally studies and verifies the DPPDW theory in a heterogeneous multiple-scattering medium. The DPPDW is generated by collecting the scattered linear polarized photon pairs (LPPPs) in the multiple-scattering medium. Theoretically, the common-path propagation of LPPPs not only provides common phase noise rejection mode but also performs coherence technique via heterodyne detection. In addition, the polarization gating and spatial coherence gating of LPPPs would suppress the severe scattered photon in the multiple-scattering medium. In the experiment, the amplitude and phase wavefronts of DPPDWs, which are distorted by a small object embedded in a homogeneous multiple-scattering medium, are measured in one dimension or two dimensions by scanning the source detector pair. The measured distortion of DPPDW wavefronts are detected precisely and are consistent with the theoretical calculation of DPPDW. It implies an improvement on the detection sensitivity of a small object compared with the conventional diffuse photon density wave (DPDW).

© 2008 Optical Society of America

OCIS Codes
(170.4090) Medical optics and biotechnology : Modulation techniques
(170.5270) Medical optics and biotechnology : Photon density waves
(290.4210) Scattering : Multiple scattering

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: December 3, 2007
Revised Manuscript: April 17, 2008
Manuscript Accepted: April 18, 2008
Published: May 8, 2008

Virtual Issues
Vol. 3, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Li-Ping Yu, Chien Chou, Jheng-Syong Wu, and Yi-Hsin Chan, "Measurement of diffuse photon-pairs density wave in a multiple-scattering medium," Appl. Opt. 47, 2708-2714 (2008)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-47-14-2708

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