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Proceedings Paper

Lau effect in GRIN media
Author(s): M. C. Garcia-Allegue; D. Nieto; M. T. Flores-Arias; C. Gómez-Reino
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Paper Abstract

The Lau effect refers to interference phenomenon involving double-grating system illuminated by an extended white light source and it has received wide attention. Until now, the Lau effect has been studied regarding double-grating system immersed in homogenous media. A generalization of Lau effect to the case of a GRIN medium is considered. We present an explanation based on the coherence theory. We begin the analysis by describing, in general terms, the propagation of the second-order field correlations in GRIN media, via the cross-spectral density function. This provides the basics for discussing the evolution of the intensity distribution and the cross-spectral density function of the field incident on the second grating. The particular case of a selfoc GRIN medium and two sinusoidal gratings is analyzed.

Paper Details

Date Published: 30 September 2005
PDF: 9 pages
Proc. SPIE 5956, Integrated Optics: Theory and Applications, 595614 (30 September 2005); doi: 10.1117/12.622172
Show Author Affiliations
M. C. Garcia-Allegue, Univ. of Santiago de Compostela (Spain)
D. Nieto, Univ. of Santiago de Compostela (Spain)
M. T. Flores-Arias, Univ. of Santiago de Compostela (Spain)
C. Gómez-Reino, Univ. of Santiago de Compostela (Spain)


Published in SPIE Proceedings Vol. 5956:
Integrated Optics: Theory and Applications
Tadeusz Pustelny; Paul V. Lambeck; Christophe Gorecki, Editor(s)

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