Quantitative two-dimensional shadowgraphic method for high-sensitivity density measurement of under-critical laser plasmas

Abstract

We present a quantitative shadowgraphic method that can measure the density of a laser-generated plasma in air. Simultaneous comparison of both shadowgraphy and interferometry has been carried out, allowing the experimental evaluation of the reliability of the shadowgraphic method. Even though limited by absorption in the sample, shadowgraphy performs better in terms of sensitivity.

© 2007 Optical Society of America

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