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Effect of Compositional Variations and Processing on the Optical Scattering of Zblan Glass

Published online by Cambridge University Press:  21 February 2011

A. E. Neeves ,
W. A. Reed ,
M. Chui-Sabourin  and
A. J. Bruce
A. E. Neeves
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
W. A. Reed
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
M. Chui-Sabourin
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
A. J. Bruce
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
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Abstract

The effects of compositional modifications, specifically oxide and p-block fluoride additions, and melt processing, via “on-situ oxidation”, have been investigated on bulk samples of ZBLAN glasses. Molecular light scattering in the Mie and Rayleigh regime has been measured as a function of scattering angle at wavelengths between 0.6 and 2.6 μm. From an analysis of the angular scattering of both vertically and horizontally polarized beams the Rayleigh ratios and dissymmetry factors are determined as a function of wavelength. The average size of the scattering sites can be estimated in the range of 0.02 and 2.0 μm. Relatively high oxide substituted ZBLAN glasses exhibit light scattering losses only moderately higher than the ZBLAN base glass, and do not show any evidence of gross phase separation or precipitation. InF3 containing samples also exhibit scattering comparable to the ZBLAN base glass. The scattering of ZBLAN at 2.6 μm is larger than the scattering predicted by extrapolating data taken at 0.647 μm using a λ−4 dependence. This added scattering may interpreted as due to either a wavelength independent contribution or a result of a difference in the wavelength dependence of the dispersion between the host and the scattering center.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 172: Symposium P – Optical Fiber Materials and Processing , 1989 , 149
Copyright
Copyright © Materials Research Society 1990

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