Tandem cladding-pumping for control of excess gain in ytterbium-doped fiber amplifiers
Tandem cladding-pumping for control of excess gain in ytterbium-doped fiber amplifiers
We theoretically detail and explain how to control unwanted excess gain for higher order modes in cladding-pumped large-core ytterbium-doped fiber amplifiers operating on the fundamental mode by using a small inner cladding and pumping close to the emission wavelength in a so-called tandem-pump configuration. Such excess gain can otherwise limit the core size. We study this experimentally by comparing the level of amplified spontaneous emission at the edge of the core in a conventional diode-pumped and tandem-pumped large-core ytterbium-doped multimode fiber. We also discuss the potential benefits of tandem pumping in reducing fiber photodarkening.
1860-1869
Codemard, Christophe A.
3aa50483-b61c-4e7e-b178-c9a88bb47bef
Sahu, Jayanta K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
November 2010
Codemard, Christophe A.
3aa50483-b61c-4e7e-b178-c9a88bb47bef
Sahu, Jayanta K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Codemard, Christophe A., Sahu, Jayanta K. and Nilsson, Johan
(2010)
Tandem cladding-pumping for control of excess gain in ytterbium-doped fiber amplifiers.
IEEE Journal of Quantum Electronics, 46 (12), .
(doi:10.1109/JQE.2010.2076408).
Abstract
We theoretically detail and explain how to control unwanted excess gain for higher order modes in cladding-pumped large-core ytterbium-doped fiber amplifiers operating on the fundamental mode by using a small inner cladding and pumping close to the emission wavelength in a so-called tandem-pump configuration. Such excess gain can otherwise limit the core size. We study this experimentally by comparing the level of amplified spontaneous emission at the edge of the core in a conventional diode-pumped and tandem-pumped large-core ytterbium-doped multimode fiber. We also discuss the potential benefits of tandem pumping in reducing fiber photodarkening.
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Published date: November 2010
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 191555
URI: http://eprints.soton.ac.uk/id/eprint/191555
ISSN: 0018-9197
PURE UUID: 4a514f10-17ea-4396-88cf-31f915dd0df7
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Date deposited: 22 Jun 2011 09:17
Last modified: 15 Mar 2024 03:09
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Author:
Christophe A. Codemard
Author:
Jayanta K. Sahu
Author:
Johan Nilsson
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