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Optics Letters

Optics Letters


  • Vol. 22, Iss. 6 — Mar. 15, 1997
  • pp: 393–395

Heterodyne detection of enhanced backscatter

M. Pitter, E. Jakeman, and M. Harris  »View Author Affiliations

Optics Letters, Vol. 22, Issue 6, pp. 393-395 (1997)

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Heterodyne detection has been used to measure the enhanced backscattering from a standard target consisting of a plane mirror positioned behind a moving ground-glass disk (assumed to act as a phase screen). A tilt of the plane mirror in combination with spectral filtering of the detector output allows isolation of the double-scattered component of the light signal. When the illuminating laser and the local oscillator beams are correctly mode matched, the intensity of this signal displays the factor-of-2 increase that denotes full coherent enhancement. This full enhancement is preserved for a wide range of mirror to phase-screen spacing, in contrast with earlier observations in which direct-detection techniques were used.

© 1997 Optical Society of America

M. Pitter, E. Jakeman, and M. Harris, "Heterodyne detection of enhanced backscatter," Opt. Lett. 22, 393-395 (1997)

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