Abstract

In this paper we study the statistical properties of both speckle patterns incident upon and emerging from a diffuse object under illumination of the laser light generated from a multimode optical fiber. The speckle field resulting from the modal noise at the exit face of the optical fiber is treated as a quasi-homogeneous monochromatic source that describes the quasi-stationary state within a finite region and, simultaneously, has the correlation coefficient that remains to be strictly stationary. The speckle pattern at the object plane in the Fresnel-diffraction field is first investigated by analyzing the propagation of the correlation function of the optical fields emerging from the source and found also to be quasi-homogeneous. Next, the correlation function of the optical field produced at the observation plane by scattering from a moving diffuse object under illumination of the above speckle pattern is analyzed in connection with the source parameters.

© 1985 Optical Society of America

Laser speckles produced by a diffuse object under illumination from a multimode optical fiber: an experimental study

Nobukatsu Takai and Toshimitsu Asakura
Appl. Opt. 27(3) 557-562 (1988)

Dynamic statistical properties of laser speckle produced by a moving diffuse object under illumination of a Gaussian beam

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Statistical properties of dynamic speckles

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Dynamic statistical properties of laser speckle due to longitudinal motion of a diffuse object under Gaussian beam illumination

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J. Opt. Soc. Am. 70(7) 827-834 (1980)

Statistical properties of the speckle phase in the optical imaging system

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