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Proceedings Paper

All-glass fiber amplifier pumped by ultrahigh brightness pump
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Paper Abstract

We investigate high brightness pumping of multi-kW fiber amplifier in a bi-directional pumping configuration. Each pump outputs 2 kW in a 200 μm, 0.2 NA multi-mode fiber. Specialty gain fibers, with 17 μm MFD and 5-dB/meter pump absorption, have been developed. The maximum fiber amplifier output power is 2550 W, limited by multi-mode instability, with 90% O-O efficiency and M2 < 1.15. The fiber amplifier linewidth is <12 GHz. We also present kW fiber amplifier results using gain fiber with metalized fiber coating.

Paper Details

Date Published: 9 March 2016
PDF: 6 pages
Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 972806 (9 March 2016); doi: 10.1117/12.2211134
Show Author Affiliations
Charles X. Yu, MIT Lincoln Lab. (United States)
Oleg Shatrovoy, MIT Lincoln Lab. (United States)
T. Y. Fan, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 9728:
Fiber Lasers XIII: Technology, Systems, and Applications
John Ballato, Editor(s)

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