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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 1 — Jan. 1, 2009
  • pp: 109–111

Power-law dependence of the photodarkening rate constant on the inversion in Yb doped fibers

Sylvia Jetschke and Ulrich Röpke  »View Author Affiliations

Optics Letters, Vol. 34, Issue 1, pp. 109-111 (2009)

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The description of the photodarkening (PD) kinetics of Yb-doped silica fibers with a stretched exponential function is analyzed in more detail, revealing a dependence of the determined PD parameter values on the measurement time. Thereby, serious uncertainties may occur in advanced interpretations of the results, e.g., the discussion of the rate constant as a function of the Yb inversion, if the measurement time is too short. A method to circumvent the problems of the fitting procedure is suggested, taking advantage of the self-similarity of the PD curves for different inversions. An exponent of 4.3 ± 0.5 in the power-law dependence of the PD rate constant τ 1 on the Yb inversion was found for a typical aluminium-codoped fiber.

© 2008 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(160.2290) Materials : Fiber materials
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 26, 2008
Revised Manuscript: November 11, 2008
Manuscript Accepted: November 17, 2008
Published: December 31, 2008

Sylvia Jetschke and Ulrich Röpke, "Power-law dependence of the photodarkening rate constant on the inversion in Yb doped fibers," Opt. Lett. 34, 109-111 (2009)

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