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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 6 — Mar. 25, 2013
  • pp: 6681–6688

Experimental evidence for the formation of divalent ytterbium in the photodarkening process of Yb-doped fiber lasers

S. Rydberg and M. Engholm  »View Author Affiliations


Optics Express, Vol. 21, Issue 6, pp. 6681-6688 (2013)
http://dx.doi.org/10.1364/OE.21.006681


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Abstract

In this work we present experimental evidence that the valence instability of the ytterbium ion play a key role for the observed photodarkening mechanism in Yb-doped fiber lasers. Luminescence and excitation spectroscopy performed on UV irradiated Yb/Al doped silica glass preforms and near-infrared diode pumped photodarkened fibers show a concentration increase of Yb2+ ions. A concentration decrease in Yb3+ could also be observed for the UV irradiated preform. The findings contribute to an increased understanding of the kinetic processes related to photodarkening in Yb-doped high power fiber lasers.

© 2013 OSA

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(160.5690) Materials : Rare-earth-doped materials
(260.5210) Physical optics : Photoionization
(140.3615) Lasers and laser optics : Lasers, ytterbium

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 11, 2013
Revised Manuscript: March 3, 2013
Manuscript Accepted: March 4, 2013
Published: March 11, 2013

Citation
S. Rydberg and M. Engholm, "Experimental evidence for the formation of divalent ytterbium in the photodarkening process of Yb-doped fiber lasers," Opt. Express 21, 6681-6688 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-6-6681


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References

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