Photodarkening rate in Yb-doped silica fibers

Photodarkening rate in Yb-doped silica fibers

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...

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Veröffentlicht in:Applied Optics 2008-03, Vol.47 (9), p.1247-1256
Hauptverfasser: Koponen, Joona, Söderlund, Mikko, Hoffman, Hanna J, Kliner, Dahv A V, Koplow, Jeffrey P, Hotoleanu, Mircea
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container_end_page 1256
container_issue 9
container_start_page 1247
container_title Applied Optics
container_volume 47
creator Koponen, Joona
Söderlund, Mikko
Hoffman, Hanna J
Kliner, Dahv A V
Koplow, Jeffrey P
Hotoleanu, Mircea
description 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.
doi_str_mv 10.1364/AO.47.001247
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title Photodarkening rate in Yb-doped silica fibers
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