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Highly efficient Tm3+ doped germanate large mode area single mode fiber laser

Highly efficient Tm3+ doped germanate large mode area single mode fiber laser
Highly efficient Tm3+ doped germanate large mode area single mode fiber laser
We report the fabrication of a low numerical aperture large mode area, high
concentration thulium doped germanate glass fiber using a rod-in tube technique. The fiber core is 20 μm in diameter and operates in the single-mode regime in the 2 μm region. The Tm3+ ion concentration is 3×1020/cm3 and the background fiber attenuation is 1.1 dB/m in the near infrared. We also demonstrate a high-power, high-efficiency fiber laser emitting at 1950 nm using a short (21-cm-long) length of the fiber. A slope efficiency of 55.9% with respect to absorbed pump power and a maximum output power of 1.52W was achieved. This represents both the highest slope efficiency and the highest output power reported so far for Tm3+ doped germanate single mode fiber using in-band core pumping. The large core area, short device length and high efficiency make this fiber attractive for the development of high peak power pulsed fiber amplifiers and single-frequency fiber lasers operating in the 2 µm region.
2159-3930
4115-4125
Ben Slimen, Fedia
e25a8c47-a615-4199-bd24-40e71c3c2d1d
Chen, Shaoxiang
c7795b39-9ec3-4156-b3d7-73822fd31809
Lousteau, Joris
0758be5e-04e3-452f-81f9-7616cf4a3de3
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
White, Nicholas
94c619a3-093f-4bbe-b313-b548a2435249
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Ben Slimen, Fedia
e25a8c47-a615-4199-bd24-40e71c3c2d1d
Chen, Shaoxiang
c7795b39-9ec3-4156-b3d7-73822fd31809
Lousteau, Joris
0758be5e-04e3-452f-81f9-7616cf4a3de3
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
White, Nicholas
94c619a3-093f-4bbe-b313-b548a2435249
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491

Ben Slimen, Fedia, Chen, Shaoxiang, Lousteau, Joris, Jung, Yongmin, White, Nicholas, Alam, Shaif-Ul, Richardson, David and Poletti, Francesco (2019) Highly efficient Tm3+ doped germanate large mode area single mode fiber laser. Optical Materials Express, 9 (8), 4115-4125. (doi:10.1364/OME.9.004115).

Record type: Article

Abstract

We report the fabrication of a low numerical aperture large mode area, high
concentration thulium doped germanate glass fiber using a rod-in tube technique. The fiber core is 20 μm in diameter and operates in the single-mode regime in the 2 μm region. The Tm3+ ion concentration is 3×1020/cm3 and the background fiber attenuation is 1.1 dB/m in the near infrared. We also demonstrate a high-power, high-efficiency fiber laser emitting at 1950 nm using a short (21-cm-long) length of the fiber. A slope efficiency of 55.9% with respect to absorbed pump power and a maximum output power of 1.52W was achieved. This represents both the highest slope efficiency and the highest output power reported so far for Tm3+ doped germanate single mode fiber using in-band core pumping. The large core area, short device length and high efficiency make this fiber attractive for the development of high peak power pulsed fiber amplifiers and single-frequency fiber lasers operating in the 2 µm region.

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More information

Accepted/In Press date: 18 July 2019
e-pub ahead of print date: 25 September 2019
Published date: 1 October 2019

Identifiers

Local EPrints ID: 434731
URI: https://eprints.soton.ac.uk/id/eprint/434731
ISSN: 2159-3930
PURE UUID: 49fb7a7f-315f-4e50-88f0-4dee92dde659
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083

Catalogue record

Date deposited: 07 Oct 2019 16:30
Last modified: 08 Oct 2019 00:56

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