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Proceedings Paper

Investigation of correlation properties of light fields by Fresnel diffraction from a step
Author(s): S. R. Hosseini; M. T. Tavassoly
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Paper Abstract

We introduce a new method, based on Fresnel diffraction of light from a step, for the study of correlation properties (temporal and spatial) of optical fields. The method renders to measure wavelength, coherence length, and coherence width by recording the visibility of the diffraction fringes versus optical path difference and spacing of the interfering beams. In addition, the method permits to specify the spectral line shape, particularly, of lights with short coherence lengths and the spatial coherence behavior of the lights with short coherence widths. Since, in the introduced method the optical path difference can be varied by changing the light incident angle, practically, in an interval of 90º, a large volume of data is acquired which leads to reliable and accurate study of the subject. The method can be applied easily using modest equipment. We have applied the method to the study of correlation properties of the lights emitted by LED, incandescent bulb, and Hg lamp.

Paper Details

Date Published: 17 December 2013
PDF: 8 pages
Proc. SPIE 9066, Eleventh International Conference on Correlation Optics, 906607 (17 December 2013); doi: 10.1117/12.2050867
Show Author Affiliations
S. R. Hosseini, Univ. of Tehran (Iran, Islamic Republic of)
M. T. Tavassoly, Univ. of Tehran (Iran, Islamic Republic of)

Published in SPIE Proceedings Vol. 9066:
Eleventh International Conference on Correlation Optics
Oleg Vyacheslavovich Angelsky, Editor(s)

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