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Proceedings Paper

Highly efficient incoherent slab-pumped fiber amplifier/laser designs
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Paper Abstract

The problem of delivering a multimode pump to a single mode core is considered. Original designs of double-clad fiber amplifiers are analyzed. A slab pump geometry of a fiber amplifier is suggested. The partially coherent pump should be coupled to the narrow slab which supports propagation of the pump and absorbs highest modes of the core, then the core itself has no need to be single-mode. The slab plays the role of cladding in conventional double-clad fibers. Such a cladding has no need to surround the core and its refractive index can be higher than that of the core. Then the highest modes of the slab are absorbed at the very beginning of the amplifier. This allows for tapering of the slab, providing almost constant pump power in the core. The end result is a the high efficiency of a compact device with scaling to high pump power. We provide the key design formulars for such a device.

Paper Details

Date Published: 19 June 2003
PDF: 9 pages
Proc. SPIE 4993, High-Power Fiber and Semiconductor Lasers, (19 June 2003); doi: 10.1117/12.479461
Show Author Affiliations
Dmitrii Kouznetsov, Univ. of Arizona (United States)
Jerome V. Moloney, Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 4993:
High-Power Fiber and Semiconductor Lasers
Mahmoud Fallahi; Jerome V. Moloney, Editor(s)

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