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Optical Engineering

Removal Of Cations From Zirconium To Permit Its Use In Low Loss Fluoride Optical Fibers
Author(s): Philipp H. Klein; Paul E. R. Nordquist; Arnold H. Singer
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Paper Abstract

For attainment of near-intrinsic losses in the 2 to 4 µm range, concentrations of cations such as iron, cobalt, nickel, and copper must lie in the 0.2 to 10 ppb range (1 ppb = 1 mol/109 mol of glass). Commercial grades of zirconium salts tend to form colloids and to contain hundreds or thousands of times more than the tolerable concentrations. We have found filtration to be partially effective for colloid removal. Working with relatively concentrated (2 molar, about 17% by weight) solutions of Zr salts, we have introduced about 7000 ppb each of Fe, Co, Ni, and Cu. We have determined that all of these metals can readily be removed by laboratory-scale ion-exchange methods to meet the cation-purity standards for near-intrinsic absorption.

Paper Details

Date Published: 1 June 1985
PDF: 2 pages
Opt. Eng. 24(3) 243516 doi: 10.1117/12.7973517
Published in: Optical Engineering Volume 24, Issue 3
Show Author Affiliations
Philipp H. Klein, Naval Research Laboratory (United States)
Paul E. R. Nordquist, Naval Research Laboratory (United States)
Arnold H. Singer, Naval Research Laboratory (United States)

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