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Amplification of 12 OAM Modes in an air-core erbium doped fiber

Amplification of 12 OAM Modes in an air-core erbium doped fiber
Amplification of 12 OAM Modes in an air-core erbium doped fiber
We theoretically propose an air-core erbium doped fiber amplifier capable of providing relatively uniform gain for 12 orbital angular momentum (OAM) modes (|L| = 5, 6 and 7, where |L| is the OAM mode order) over the C-band. Amplifier performance under core pumping conditions for a uniformly doped core for each of the supported pump modes (110 in total) was separately assessed. The differential modal gain (DMG) was found to vary significantly depending on the pump mode used, and the minimum DMG was found to be 0.25 dB at 1550 nm provided by the OAM (8,1) pump mode. A tailored confined doping profile can help to reduce the pump mode dependency for core pumped operation and help to increase the number of pump modes that can support a DMG below 1 dB. For the more practical case of cladding-pumped operation, where the pump mode dependency is almost removed, a DMG of 0.25 dB and a small signal gain of >20 dB can be achieved for the 12 OAM modes across the full C-band.
1094-4087
28341-28348
Kang, Qiongyue
261baa75-d2c0-46f1-9386-3c6a138129f0
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Alam, Shaiful
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Kang, Qiongyue
261baa75-d2c0-46f1-9386-3c6a138129f0
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Alam, Shaiful
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Kang, Qiongyue, Jung, Yongmin, Alam, Shaiful and Richardson, David (2015) Amplification of 12 OAM Modes in an air-core erbium doped fiber. Optics Express, 23 (22), 28341-28348. (doi:10.1364/OE.23.028341). (PMID:26561104)

Record type: Article

Abstract

We theoretically propose an air-core erbium doped fiber amplifier capable of providing relatively uniform gain for 12 orbital angular momentum (OAM) modes (|L| = 5, 6 and 7, where |L| is the OAM mode order) over the C-band. Amplifier performance under core pumping conditions for a uniformly doped core for each of the supported pump modes (110 in total) was separately assessed. The differential modal gain (DMG) was found to vary significantly depending on the pump mode used, and the minimum DMG was found to be 0.25 dB at 1550 nm provided by the OAM (8,1) pump mode. A tailored confined doping profile can help to reduce the pump mode dependency for core pumped operation and help to increase the number of pump modes that can support a DMG below 1 dB. For the more practical case of cladding-pumped operation, where the pump mode dependency is almost removed, a DMG of 0.25 dB and a small signal gain of >20 dB can be achieved for the 12 OAM modes across the full C-band.

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More information

Submitted date: 29 July 2015
Accepted/In Press date: 28 September 2015
Published date: 21 October 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 384305
URI: https://eprints.soton.ac.uk/id/eprint/384305
ISSN: 1094-4087
PURE UUID: 17c2cf07-6c9a-4d0e-84db-ae2c27168d38
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 11 Dec 2015 09:35
Last modified: 03 Dec 2019 02:05

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