Abstract

A method is presented for high-range resolution measurement of the backscatter from a scattering medium located in one arm of an interferometer. The technique is interferometric in nature and relies on the availability of a cw laser with a significant linewidth. The measurement is based on observing coherent interference (equivalent to white-light fringes) between the return from the two arms of the interferometer for the portion of the backscatter that makes the path lengths equal. Experimental results are presented for backscatter from a turbid medium and from a stack of glass plates.

© 1977 Optical Society of America

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References

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  1. A. P. Ivanov, Optics for Scattering Media (Nauka i Technika Press, Minsk, 1969).
  2. V. E. Zuev, Laser as a Meteorologist (Gidrometeoizdat, Leningrad, 1974).
  3. A. P. Ivanov, A. L. Skrelin, I. D. Sherbaf, J. Appl. Spectrosc. (USSR), 17, 240, 1972.
  4. A. P. Ivanov, in Quantum Electronics and Laser Spectroscopy (Nauka i Technika Press, Minsk, 1974).
  5. In view of the picosecond technique inperfection, the application of mode-locked lasers to this problem is currently unsuccessful.
  6. A. P. Ivanov, I. M. Jurskii, Pat. appl. 2145847/25, June20, 1975.
  7. A. P. Ivanov, I. M. Yurskii, New Method for Study of the Nonstationary Scattering Light Processes in Non-homogeneous Media. Preprint 104, Institute of Physics of Academy of Sciences of the Byelorussian SSR, Minsk, 1976.
  8. The peak (spike) of the autocorrelation function of the radiation field whose width is determined by the number of the axial modes in laser radiation hereafter will be referred to simply as the coherence function.

1972 (1)

A. P. Ivanov, A. L. Skrelin, I. D. Sherbaf, J. Appl. Spectrosc. (USSR), 17, 240, 1972.

Ivanov, A. P.

A. P. Ivanov, A. L. Skrelin, I. D. Sherbaf, J. Appl. Spectrosc. (USSR), 17, 240, 1972.

A. P. Ivanov, I. M. Yurskii, New Method for Study of the Nonstationary Scattering Light Processes in Non-homogeneous Media. Preprint 104, Institute of Physics of Academy of Sciences of the Byelorussian SSR, Minsk, 1976.

A. P. Ivanov, Optics for Scattering Media (Nauka i Technika Press, Minsk, 1969).

A. P. Ivanov, in Quantum Electronics and Laser Spectroscopy (Nauka i Technika Press, Minsk, 1974).

A. P. Ivanov, I. M. Jurskii, Pat. appl. 2145847/25, June20, 1975.

Jurskii, I. M.

A. P. Ivanov, I. M. Jurskii, Pat. appl. 2145847/25, June20, 1975.

Sherbaf, I. D.

A. P. Ivanov, A. L. Skrelin, I. D. Sherbaf, J. Appl. Spectrosc. (USSR), 17, 240, 1972.

Skrelin, A. L.

A. P. Ivanov, A. L. Skrelin, I. D. Sherbaf, J. Appl. Spectrosc. (USSR), 17, 240, 1972.

Yurskii, I. M.

A. P. Ivanov, I. M. Yurskii, New Method for Study of the Nonstationary Scattering Light Processes in Non-homogeneous Media. Preprint 104, Institute of Physics of Academy of Sciences of the Byelorussian SSR, Minsk, 1976.

Zuev, V. E.

V. E. Zuev, Laser as a Meteorologist (Gidrometeoizdat, Leningrad, 1974).

J. Appl. Spectrosc. (USSR) (1)

A. P. Ivanov, A. L. Skrelin, I. D. Sherbaf, J. Appl. Spectrosc. (USSR), 17, 240, 1972.

Other (7)

A. P. Ivanov, in Quantum Electronics and Laser Spectroscopy (Nauka i Technika Press, Minsk, 1974).

In view of the picosecond technique inperfection, the application of mode-locked lasers to this problem is currently unsuccessful.

A. P. Ivanov, I. M. Jurskii, Pat. appl. 2145847/25, June20, 1975.

A. P. Ivanov, I. M. Yurskii, New Method for Study of the Nonstationary Scattering Light Processes in Non-homogeneous Media. Preprint 104, Institute of Physics of Academy of Sciences of the Byelorussian SSR, Minsk, 1976.

The peak (spike) of the autocorrelation function of the radiation field whose width is determined by the number of the axial modes in laser radiation hereafter will be referred to simply as the coherence function.

A. P. Ivanov, Optics for Scattering Media (Nauka i Technika Press, Minsk, 1969).

V. E. Zuev, Laser as a Meteorologist (Gidrometeoizdat, Leningrad, 1974).

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Figures (2)

Fig. 1
Fig. 1

Experimental setup diagram. S is the light source, an argon laser; BS is the beam splitter; M is the mirror; SV is the scattering volume; H is the hole in the light-tight casing 2 of photoreceiver amplifier; 3 is the resonance amplifier; and 4 is the oscillograph.

Fig. 2
Fig. 2

The dependence of the coherent component intensity on the optic delay. 1 is the plate ream and 2 is the turbid volume.

Equations (2)

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Δ t 1 / ε c .
l 0 = λ 2 / Δ λ .

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