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Proceedings Paper

Interferometric detection of photothermal effects in uranyl optical glass
Author(s): Alexandru M. Preda; Constantin P. Cristescu; Ion M. Popescu; Liliana Preda; Eugen Nicolae Scarlat
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Paper Abstract

In this paper we present a sensitive photothermal interferometric detection technique using a Wollaston prism. The interference fringe pattern is formed by overlapping of the ordinary and extraordinary beams with adjustable intensities by a linear polarizer. The interferometric montage is made both for the pump beam (Ar-ion laser) and the probe beam (He-Ne laser). From the analysis of the interference patterns obtained separately for the two beams, we calculate the absolute change of the refractive index in the middle of the heated zone of an uranyl-doped optical glass, as well as the average transverse refractive index gradient induced by the pump laser. The experimental results are interpreted in terms of a Gaussian beam propagating through a weak absorptive medium whose refractive index is thermally modified by the pump beam.

Paper Details

Date Published: 29 June 2001
PDF: 9 pages
Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); doi: 10.1117/12.432806
Show Author Affiliations
Alexandru M. Preda, Univ. Politehnica Bucharest (Romania)
Constantin P. Cristescu, Univ. Politehnica Bucharest (Romania)
Ion M. Popescu, Univ. Politehnica Bucharest (Romania)
Liliana Preda, Univ. Politehnica Bucharest (Romania)
Eugen Nicolae Scarlat, Univ. Politehnica Bucharest (Romania)

Published in SPIE Proceedings Vol. 4430:
ROMOPTO 2000: Sixth Conference on Optics
Valentin I. Vlad, Editor(s)

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