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Proceedings Paper

The contrast of femtosecond laser speckles in the image plane
Author(s): Wenjun Liu; Changhe Zhou
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Paper Abstract

We put forward the concept of femtosecond laser speckles and studied twelve speckle patterns produced by four aluminium sheets with different surface roughness under illumination of three laser sources of one continuous wave laser and two other femtosecond pulsed lasers with FWHM widths of 36fs and 12fs, respectively. The femtosecond laser speckles are different from the conventional speckles in that femtosecond pulsed laser contain ultra-wide spectral contents. We explain the reason that makes femtosecond laser speckles different from conventional speckles. The relationship between speckle contrast and bandwidth of femtosecond laser is established, which well explains the experimental speckle contrast of the twelve speckle patterns.

Paper Details

Date Published: 11 January 2005
PDF: 5 pages
Proc. SPIE 5642, Information Optics and Photonics Technology, (11 January 2005); doi: 10.1117/12.576186
Show Author Affiliations
Wenjun Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Changhe Zhou, Shanghai Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 5642:
Information Optics and Photonics Technology
Guoguang Mu; Francis T. S. Yu; Suganda Jutamulia, Editor(s)

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