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Proceedings Paper

Numerical optimisation of pump absorption in doped double-clad fiber with transverse and longitudinal perturbation
Author(s): Christophe A. Codemard; Andy Malinowski; Michalis N. Zervas
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Paper Abstract

We report on the impact of the cross-sectional shape of the inner cladding of double-clad fiber on pump absorption using a Beam Propagation Method based on azimuthal harmonics expansions and the so-called "superformula" to describe complex shapes. The impact of shaped cladding and of the fiber layout on pump absorption of double-clad fiber is studied. We observe that for nearly circular cross-section fibers the pump absorption can be enhanced to match that of fiber with strong azimuthal asymmetry, through optimised fiber layout that maximizes pump mixing.

Paper Details

Date Published: 22 February 2017
PDF: 7 pages
Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 1008315 (22 February 2017); doi: 10.1117/12.2252091
Show Author Affiliations
Christophe A. Codemard, SPI Lasers UK Ltd. (United Kingdom)
Andy Malinowski, SPI Lasers UK Ltd. (United Kingdom)
Michalis N. Zervas, SPI Lasers UK Ltd. (United Kingdom)
Univ. of Southampton (United Kingdom)

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

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