CARDINAL, Thierry; EFIMOV, O. M.; FRANÇOIS-SAINT-CYR, H. G.; GLEBOV, L. B.; GLEBOVA, L. N.; SMIRNOV, V. I.

doi:10.1016/S0022-3093(03)00310-7

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CARDINAL, Thierry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

EFIMOV, O. M.
HRL Laboratories

FRANÇOIS-SAINT-CYR, H. G.
The College of Optics and Photonics [Orlando] [CREOL]

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Journal of Non-Crystalline Solids. 2003, vol. 325, n° 1-3, p. 275-281

Elsevier

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Spontaneous and photo-induced crystallization have been investigated in fluorinated silicate glass by means of X-ray diffraction and optical interferometry. This glass is a photo-sensitive material for high-efficiency phase volume hologram recording. Variations of a refractive index in this glass are controlled by UV irradiation followed by a thermal development which is photo-thermo-refractive (PTR) process. A method of discrimination of weak narrow crystalline lines from a broad diffractive pattern of a vitreous material was developed, and quantitative measurements of small concentrations of crystalline phase in glass matrix were performed. The sensitivity of the method was about 0.01 wt% of crystalline phase of NaF in a silicate glass. This crystalline phase with concentration below 0.1 wt% was detected even in a highly transparent PTR glass with a modified refractive index produced by PTR processing. A correlation between the intensity of X-ray diffraction peaks of NaF and the induced refractive index was found in equally developed PTR glass samples exposed to different dosages of UV radiation.< Leer menos

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Photo induced effect

Crystallization

Fluorinated silicate X-ray diffraction

Optical interferometry

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Comparative study of photo-induced variations of X-ray diffraction and refractive index in photo-thermo-refractive glass

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