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Proceedings Paper

The first experimental observation of long-term mode degradation in high peak power Yb-doped amplifiers
Author(s): Konstantin K. Bobkov; Mikhail M. Bubnov; Svetlana S. Aleshkina; Mikhail E. Likhachev
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Paper Abstract

Experimental observation of a novel effect of long-term mode shape degradation in a high peak power ytterbium-doped pulsed fiber lasers based on large mode area step-index fibers has been reported for the first time. It is shown, that the degradation is caused by power coupling from LP01 to LP11 mode, occurring on a long period refractive index grating (LPG) formed in the active fiber core. The photo-darkening process was found to play a significant role in the formation of a LPG.

Paper Details

Date Published: 22 February 2017
PDF: 7 pages
Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 100830T (22 February 2017); doi: 10.1117/12.2251734
Show Author Affiliations
Konstantin K. Bobkov, Fiber Optics Research Ctr. (Russian Federation)
Mikhail M. Bubnov, Fiber Optics Research Ctr. (Russian Federation)
Svetlana S. Aleshkina, Fiber Optics Research Ctr. (Russian Federation)
Mikhail E. Likhachev, Fiber Optics Research Ctr. (Russian Federation)


Published in SPIE Proceedings Vol. 10083:
Fiber Lasers XIV: Technology and Systems
Craig A. Robin; Ingmar Hartl, Editor(s)

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