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Study on the dopant concentration ratio in thulium-holmium doped silica fibers for lasing at 2.1µm

Study on the dopant concentration ratio in thulium-holmium doped silica fibers for lasing at 2.1µm
Study on the dopant concentration ratio in thulium-holmium doped silica fibers for lasing at 2.1µm
We present the fabrication and laser performance of thulium-holmium co-doped silica fibers when cladding pumped at ∼790 nm. By using the hybrid gas phase-solution doping process in conjunction with the MCVD preform fabrication technique, the doping concentration and the Tm:Ho ratio were varied to study the energy transfer efficiency from Tm3+ to Ho3+. Our study indicates that for a thulium concentration that has resulted in an efficient two-for-one cross- relaxation process with 790 nm pumping, and while maintaining a Tm:Ho concentration ratio in the range ∼ 10 to 20, the energy transfer efficiency has reached above 75%. In a free-running laser cavity, the pump power limited laser output of 38W with a slope efficiency of 56% at 2.1 microns is demonstrated.
1094-4087
24961-24967
Ramírez Martínez, N.J.
3c0182fc-1942-4cf5-973f-72e0cafa7fcd
Núñez-Velázquez, Martin Miguel Angel
3c102956-ac51-4d02-9fe6-6628557cfbff
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Ramírez Martínez, N.J.
3c0182fc-1942-4cf5-973f-72e0cafa7fcd
Núñez-Velázquez, Martin Miguel Angel
3c102956-ac51-4d02-9fe6-6628557cfbff
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2

Ramírez Martínez, N.J., Núñez-Velázquez, Martin Miguel Angel and Sahu, Jayanta (2020) Study on the dopant concentration ratio in thulium-holmium doped silica fibers for lasing at 2.1µm. Optics Express, 28 (17), 24961-24967. (doi:10.1364/OE.397855).

Record type: Article

Abstract

We present the fabrication and laser performance of thulium-holmium co-doped silica fibers when cladding pumped at ∼790 nm. By using the hybrid gas phase-solution doping process in conjunction with the MCVD preform fabrication technique, the doping concentration and the Tm:Ho ratio were varied to study the energy transfer efficiency from Tm3+ to Ho3+. Our study indicates that for a thulium concentration that has resulted in an efficient two-for-one cross- relaxation process with 790 nm pumping, and while maintaining a Tm:Ho concentration ratio in the range ∼ 10 to 20, the energy transfer efficiency has reached above 75%. In a free-running laser cavity, the pump power limited laser output of 38W with a slope efficiency of 56% at 2.1 microns is demonstrated.

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Accepted/In Press date: 17 July 2020
Published date: 17 August 2020

Identifiers

Local EPrints ID: 444563
URI: http://eprints.soton.ac.uk/id/eprint/444563
ISSN: 1094-4087
PURE UUID: 8f8dfdff-413e-4679-977c-49ebc9f8b428
ORCID for N.J. Ramírez Martínez: ORCID iD orcid.org/0000-0001-8711-792X
ORCID for Martin Miguel Angel Núñez-Velázquez: ORCID iD orcid.org/0000-0003-0774-3272
ORCID for Jayanta Sahu: ORCID iD orcid.org/0000-0003-3560-6152

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Date deposited: 26 Oct 2020 17:30
Last modified: 28 Apr 2022 02:20

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Contributors

Author: N.J. Ramírez Martínez ORCID iD
Author: Jayanta Sahu ORCID iD

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