High-energy, in-band pumped erbium doped fiber amplifiers
High-energy, in-band pumped erbium doped fiber amplifiers
We have demonstrated and compared high-energy, in-band pumped erbium doped fiber amplifiers operating at 1562.5 nm under both a core pumping scheme (CRS) and a cladding pumping scheme (CLS). The CRS/CLS sources generated smooth, single-peak pulses with maximum pulse energies of ~1.53/1.50 mJ, and corresponding pulse widths of ~176/182 ns respectively, with an M2 of ~1.6 in both cases. However, the conversion efficiency for the CLS was >1.5 times higher than the equivalent CRS variant operating at the same pulse energy due to the lower pump intensity in the CLS that mitigates the detrimental effects of ion concentration quenching. With a longer fiber length in a CLS implementation a pulse energy of ~2.6 mJ is demonstrated with a corresponding M2 of ~4.2. Using numerical simulations we explain that the saturation of pulse energy observed in our experiments is due to saturation of the pump absorption.
18803-18818
Lim, Ee-Leong
55c097dc-30d4-49df-9995-894c87dc2560
Alam, Shaif-ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
August 2012
Lim, Ee-Leong
55c097dc-30d4-49df-9995-894c87dc2560
Alam, Shaif-ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Lim, Ee-Leong, Alam, Shaif-ul and Richardson, David J.
(2012)
High-energy, in-band pumped erbium doped fiber amplifiers.
Optics Express, 20 (17), .
(doi:10.1364/OE.20.018803).
Abstract
We have demonstrated and compared high-energy, in-band pumped erbium doped fiber amplifiers operating at 1562.5 nm under both a core pumping scheme (CRS) and a cladding pumping scheme (CLS). The CRS/CLS sources generated smooth, single-peak pulses with maximum pulse energies of ~1.53/1.50 mJ, and corresponding pulse widths of ~176/182 ns respectively, with an M2 of ~1.6 in both cases. However, the conversion efficiency for the CLS was >1.5 times higher than the equivalent CRS variant operating at the same pulse energy due to the lower pump intensity in the CLS that mitigates the detrimental effects of ion concentration quenching. With a longer fiber length in a CLS implementation a pulse energy of ~2.6 mJ is demonstrated with a corresponding M2 of ~4.2. Using numerical simulations we explain that the saturation of pulse energy observed in our experiments is due to saturation of the pump absorption.
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Published date: August 2012
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 342417
URI: http://eprints.soton.ac.uk/id/eprint/342417
ISSN: 1094-4087
PURE UUID: 932f6fb3-0ab9-403d-9c1f-56948252050b
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Date deposited: 29 Aug 2012 11:01
Last modified: 15 Mar 2024 02:41
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Author:
Ee-Leong Lim
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