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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 9 — Mar. 20, 2008
  • pp: 1247–1256

Photodarkening rate in Yb-doped silica fibers

Joona Koponen, Mikko Söderlund, Hanna J. Hoffman, Dahv A. V. Kliner, Jeffrey P. Koplow, and Mircea Hotoleanu  »View Author Affiliations

Applied Optics, Vol. 47, Issue 9, pp. 1247-1256 (2008)

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Yb-doped fibers are widely used in laser applications requiring high average output powers and high-peak-power pulse amplification. Photodarkening (PD) is recognized as one limiting factor in these fibers when pumped with high-intensity radiation. We describe an approach for performing quantitative PD studies of fibers, and we present measurements of the rate of PD in Yb-doped single-mode fibers with varying inversion levels. The method is applicable to large-mode-area fibers. We observed a seventh- order dependence of the PD rate on the excited-state Yb concentration for two different fibers; this result implies that PD of a Yb-doped fiber source fabricated using a particular fiber will be strongly dependent on the configuration of the device.

© 2008 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2290) Fiber optics and optical communications : Fiber materials
(140.3380) Lasers and laser optics : Laser materials
(140.3510) Lasers and laser optics : Lasers, fiber
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 14, 2007
Revised Manuscript: January 16, 2008
Manuscript Accepted: January 22, 2008
Published: March 18, 2008

Joona Koponen, Mikko Söderlund, Hanna J. Hoffman, Dahv A. V. Kliner, Jeffrey P. Koplow, and Mircea Hotoleanu, "Photodarkening rate in Yb-doped silica fibers," Appl. Opt. 47, 1247-1256 (2008)

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