Diode-pumped narrow linewidth multi-kilowatt metalized Yb fiber amplifier

We investigate high brightness pumping of a multi-kilowatt Yb fiber amplifier in a bi-directional pumping configuration. Each pump outputs 2 kW in a 200 μm, 0.2 NA multimode fiber. Gold-coated specialty gain fibers, with a 17 μm mode field diameter and a 5 dB/m pump absorption, have been developed....

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Bibliographic Details
Published inOptics letters Vol. 41; no. 22; p. 5202
Main Authors Yu, Charles X, Shatrovoy, Oleg, Fan, T Y, Taunay, Thierry F
Format Journal Article
LanguageEnglish
Published United States 15.11.2016
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Summary:We investigate high brightness pumping of a multi-kilowatt Yb fiber amplifier in a bi-directional pumping configuration. Each pump outputs 2 kW in a 200 μm, 0.2 NA multimode fiber. Gold-coated specialty gain fibers, with a 17 μm mode field diameter and a 5 dB/m pump absorption, have been developed. The maximum fiber amplifier output power is 3.1 kW, limited by multimode instability, with 90% O-O efficiency and M <1.15. The fiber amplifier linewidth is 12 GHz.
ISSN:1539-4794
DOI:10.1364/ol.41.005202