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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
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.
0018-9197
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
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), 1860-1869. (doi:10.1109/JQE.2010.2076408).

Record type: Article

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: https://eprints.soton.ac.uk/id/eprint/191555
ISSN: 0018-9197
PURE UUID: 4a514f10-17ea-4396-88cf-31f915dd0df7
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

Catalogue record

Date deposited: 22 Jun 2011 09:17
Last modified: 19 Sep 2019 00:37

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Contributors

Author: Christophe A. Codemard
Author: Jayanta K. Sahu
Author: Johan Nilsson ORCID iD

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