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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 20 — Sep. 26, 2011
  • pp: 19340–19345

Concentration dependence and self-similarity of photodarkening losses induced in Yb-doped fibers by comparable excitation

Stefano Taccheo, Hrvoje Gebavi, Achille Monteville, Olivier Le Goffic, David Landais, David Mechin, Denis Tregoat, Benoit Cadier, Thierry Robin, Daniel Milanese, and Tim Durrant  »View Author Affiliations


Optics Express, Vol. 19, Issue 20, pp. 19340-19345 (2011)
http://dx.doi.org/10.1364/OE.19.019340


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Abstract

We report on an extensive investigation of photodarkening in Yb-doped silica fibers. A set of similar fibers, covering a large Yb concentration range, was made so as to compare the photodarkening induced losses. Careful measurements were made to ensure equal and uniform inversion for all the tested fibers. The results show that, with the specific set-up, the stretching parameter obtained through fitting has a very limited variation. This gives more meaning to the fitting parameters. Results tend to indicate a square law dependence of the concentration of excited ions on the final saturated loss. We also demonstrate self-similarity of loss evolution when experimental curves are simply normalized to fitting parameters. This evidence of self-similarity also supports the possibility of introducing a preliminary figure of merit for Yb-doped fiber. This will allow the impact of photodarkening on laser/amplifier devices to be evaluated.

© 2011 OSA

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(140.3510) Lasers and laser optics : Lasers, fiber
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 1, 2011
Revised Manuscript: September 2, 2011
Manuscript Accepted: September 2, 2011
Published: September 20, 2011

Citation
Stefano Taccheo, Hrvoje Gebavi, Achille Monteville, Olivier Le Goffic, David Landais, David Mechin, Denis Tregoat, Benoit Cadier, Thierry Robin, Daniel Milanese, and Tim Durrant, "Concentration dependence and self-similarity of photodarkening losses induced in Yb-doped fibers by comparable excitation," Opt. Express 19, 19340-19345 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-20-19340


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References

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