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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 25 — Sep. 1, 2008
  • pp: 4522–4528

Inversion behavior in core- and cladding-pumped Yb-doped fiber photodarkening measurements

Joona Koponen, Marko Laurila, and Mircea Hotoleanu  »View Author Affiliations


Applied Optics, Vol. 47, Issue 25, pp. 4522-4528 (2008)
http://dx.doi.org/10.1364/AO.47.004522


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Abstract

Yb-doped fibers are widely used in applications requiring high average output powers and high power pulse amplification. Photodarkening of the Yb-doped silicate glass core potentially limits the lifetime or efficiency of such fiber devices. In many studies of photodarkening, two principal methods of controllably inducing an inversion are used, namely, cladding pumping and core pumping of the sample. We present simulation results describing the key differences in the inversion profiles of samples of different physical parameters in these two cases, and we discuss the problems and possibilities that arise in benchmarking fibers of various physical parameters. Based on the simulation and experimental work, we propose guidelines for photodarkening benchmarking measurements and show examples of measurements made within and outside of the guidelines.

© 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:
Lasers and Laser Optics

History
Original Manuscript: June 17, 2008
Manuscript Accepted: July 17, 2008
Published: August 22, 2008

Citation
Joona Koponen, Marko Laurila, and Mircea Hotoleanu, "Inversion behavior in core- and cladding-pumped Yb-doped fiber photodarkening measurements," Appl. Opt. 47, 4522-4528 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-25-4522

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