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Proceedings Paper

Investigation of radiation-induced photodarkening in passive erbium-, ytterbium-, and Yb/Er co-doped optical fibers
Author(s): B. P. Fox; K. Simmons-Potter; J. H. Simmons; W. J. Thomes; R. P. Bambha; D. A. V. Kliner
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Paper Abstract

The deployment of optical fibers in adverse radiation environments, such as those encountered in a low-Earth-orbit space setting, makes critical the development of an understanding of the effect of large accumulated ionizing-radiation doses on optical components and systems. In particular, gamma radiation is known to considerably affect the performance of optical components by inducing absorbing centers in the materials. Such radiation is present both as primary background radiation and as secondary radiation induced by proton collisions with space-craft material. This paper examines the effects of gamma radiation on erbium-, ytterbium-, and Yb/Er co-doped optical fibers by exposing a suite of such fibers to radiation from a Co-60 source over long periods of time while monitoring the temporal and spectral decrease in transmittance of a reference signal. For same total doses, results show increased photodarkening in erbium-doped fibers relative to ytterbium-doped fibers, as well as significant radiation resistance of the co-doped fibers over wavelengths of 1.0 - 1.6 microns. All three types of fibers were seen to exhibit dose-rate dependences.

Paper Details

Date Published: 26 September 2007
PDF: 9 pages
Proc. SPIE 6713, Nanophotonics and Macrophotonics for Space Environments, 67130R (26 September 2007); doi: 10.1117/12.735212
Show Author Affiliations
B. P. Fox, Univ. of Arizona (United States)
K. Simmons-Potter, Univ. of Arizona (United States)
J. H. Simmons, Univ. of Arizona (United States)
W. J. Thomes, Sandia National Labs. (United States)
R. P. Bambha, Sandia National Labs. (United States)
D. A. V. Kliner, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 6713:
Nanophotonics and Macrophotonics for Space Environments
Edward W. Taylor; David A. Cardimona, Editor(s)

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