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Multimode-pumped Raman amplification of a higher order mode in a large mode area fiber

Multimode-pumped Raman amplification of a higher order mode in a large mode area fiber
Multimode-pumped Raman amplification of a higher order mode in a large mode area fiber
We report the first demonstration of Raman amplification in a fiber of a single Bessel-like higher order mode using a multimode pump source. We amplify the LP08-mode with a 559-µm2 effective mode area at a signal wavelength of 1115 nm in a pure-silica-core step-index fiber. A maximum of 18 dB average power gain is achieved in a 9-m long gain fiber, with output pulse energy of 115 µJ. The Raman pump source comprises a pulsed 1060 nm ytterbium-doped fiber amplifier with V-value ~30, which is matched to the Raman gain fiber. The pump depletion as averaged over the signal pulses reaches 36.7%. The conversion of power from the multimode pump into the signal mode demonstrates the potential for efficient brightness enhancement with low amplification-induced signal mode purity degradation.
1094-4087
2395-23304
Zhu, Sheng
0c71d889-2dbe-4bcc-add0-02e00d93cc77
Pidishety, Shankar
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Feng, Yutong
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Hong, Soonki
c762838f-90db-4594-9d1d-446279e59a30
Demas, Jeff
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Sidharthan, Raghuraman
ea6ed907-3e88-499c-8273-e2a45d53c619
Yoo, Seongwoo
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Ramachandran, Siddharth
359e09e7-f6b5-4f04-8eba-04ab414d30c2
Srinivasan, Balaji
b04f794d-be0c-41d1-98e6-791458fb2eba
Nilsson, Johan
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Zhu, Sheng
0c71d889-2dbe-4bcc-add0-02e00d93cc77
Pidishety, Shankar
b693fa46-8454-4577-8166-6a8ae2d3f19c
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Hong, Soonki
c762838f-90db-4594-9d1d-446279e59a30
Demas, Jeff
c587c9ad-c5c9-4d63-8d46-fc08d423132d
Sidharthan, Raghuraman
ea6ed907-3e88-499c-8273-e2a45d53c619
Yoo, Seongwoo
f56cdc58-c6c4-4536-b15a-2bacf26ca7f8
Ramachandran, Siddharth
359e09e7-f6b5-4f04-8eba-04ab414d30c2
Srinivasan, Balaji
b04f794d-be0c-41d1-98e6-791458fb2eba
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b

Zhu, Sheng, Pidishety, Shankar, Feng, Yutong, Hong, Soonki, Demas, Jeff, Sidharthan, Raghuraman, Yoo, Seongwoo, Ramachandran, Siddharth, Srinivasan, Balaji and Nilsson, Johan (2018) Multimode-pumped Raman amplification of a higher order mode in a large mode area fiber. Optics Express, 26 (18), 2395-23304. (doi:10.1364/OE.26.023295).

Record type: Article

Abstract

We report the first demonstration of Raman amplification in a fiber of a single Bessel-like higher order mode using a multimode pump source. We amplify the LP08-mode with a 559-µm2 effective mode area at a signal wavelength of 1115 nm in a pure-silica-core step-index fiber. A maximum of 18 dB average power gain is achieved in a 9-m long gain fiber, with output pulse energy of 115 µJ. The Raman pump source comprises a pulsed 1060 nm ytterbium-doped fiber amplifier with V-value ~30, which is matched to the Raman gain fiber. The pump depletion as averaged over the signal pulses reaches 36.7%. The conversion of power from the multimode pump into the signal mode demonstrates the potential for efficient brightness enhancement with low amplification-induced signal mode purity degradation.

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Accepted/In Press date: 23 July 2018
e-pub ahead of print date: 23 August 2018

Identifiers

Local EPrints ID: 424810
URI: http://eprints.soton.ac.uk/id/eprint/424810
ISSN: 1094-4087
PURE UUID: 906be7f2-9abd-43b4-8ba5-a054a7fb944c
ORCID for Sheng Zhu: ORCID iD orcid.org/0000-0002-4256-6307
ORCID for Yutong Feng: ORCID iD orcid.org/0000-0002-6839-2106
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

Catalogue record

Date deposited: 05 Oct 2018 11:47
Last modified: 07 Oct 2020 08:01

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Contributors

Author: Sheng Zhu ORCID iD
Author: Yutong Feng ORCID iD
Author: Soonki Hong
Author: Jeff Demas
Author: Raghuraman Sidharthan
Author: Seongwoo Yoo
Author: Siddharth Ramachandran
Author: Balaji Srinivasan
Author: Johan Nilsson ORCID iD

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