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The Effect of Growth Atmosphere Contamination on the Optical Quality of Fluoride Laser Crystals

Published online by Cambridge University Press:  15 February 2011

A. Cassanho  and
H. P. Jenssen
A. Cassanho
Affiliation:
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
H. P. Jenssen
Affiliation:
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

Oxygen and moisture present in the growth atmosphere, may react with fluoride melts, compromising the optical quality of the grown crystals. Low level oxygen contamination can appear as an oxyfluoride coating over YLF boules without affecting their quality or as haze or milkiness in BaY2F8 and in LISAF and its analogs. Vacuum furnaces used to lower the level of these contaminants introduce hydrocarbon residues that might reduce the valence state of dopant ions such as Cr and Yb in some fluoride systems. Cr-doped LICAF and LISAF have similar behavior in contaminated atmospheres, whereas Cr-doped LISGAF displays very different behavior.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 329: Symposium R – New Materials for Advanced Solid State Lasers , 1993 , 227
Copyright
Copyright © Materials Research Society 1994

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