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Extraction of Quasi-Straightforward-Propagating Photons Through a Scattering Medium by Up-Conversion Method as a Coherent Light Detection Technique

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Abstract

Aiming at the realization of optical CT (computed tomography), the extraction of quasi-straightforward-propagating photons from optical pulses transmitting through a standard scattering medium of Intralipid-10% aqueous solution has been demonstrated by an up-conversion method (second harmonic generation). We have found that this operates as a coherent light detection method rather than a time-gate one and extends the dynamic range where the Lambert-Beer’s law holds to − 86 dB. We have also proposed improvements to obtain the largest possible dynamic range by such an up-conversion technique.

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Authors and Affiliations

  1. Faculty of Engineering, Osaka Prefecture University, Department of Physics and Electronics, Gakuen-cho, 1-1, Sakai, Osaka, 599-8531, Japan

    Kenji WADA, Yoshihiro MlSHINA, Shigenori FUJIWARA & Hiromichi HORINAKA

  2. Oyokoden Applied Photonics Lab Co., Ltd., 5301, Haga, Okayama, Okayama, 701-12, Japan

    Yoshio CHO

  3. School of Allied Health Sciences, KITASATO University, 1-15-1, Kitasato, Sagamihara, Kanagawa, 228-8555, Japan

    Tokuo UMEDA

Authors
  1. Kenji WADA
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  2. Yoshihiro MlSHINA
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  3. Shigenori FUJIWARA
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  4. Hiromichi HORINAKA
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  5. Yoshio CHO
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  6. Tokuo UMEDA
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Corresponding author

Correspondence to Kenji WADA.

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WADA, K., MlSHINA, Y., FUJIWARA, S. et al. Extraction of Quasi-Straightforward-Propagating Photons Through a Scattering Medium by Up-Conversion Method as a Coherent Light Detection Technique. OPT REV 6, 93–96 (1999). https://doi.org/10.1007/s10043-999-0093-5

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  • DOI: https://doi.org/10.1007/s10043-999-0093-5

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