The University of Southampton
University of Southampton Institutional Repository

Compact chirped-pulse amplification systems based on highly Tm3+ doped germanate fiber

Compact chirped-pulse amplification systems based on highly Tm3+ doped germanate fiber
Compact chirped-pulse amplification systems based on highly Tm3+ doped germanate fiber
We report the fabrication of a dual cladding large mode area (LMA) thulium doped germanate fiber (TDGF). The fiber has a core diameter of 20 µm, a high Tm3+ ion concentration of 3×1020/cm3 and an hexagonal inner-cladding to enhance pump absorption when cladding pumped. Using short length of it, we demonstrate a compact 300 fs chirped-pulse amplification (CPA) system operating at 1925 nm, investigating both core- and cladding-pumped implementations. By cladding pumping a 65 cm length we produced an average power of 14.1 W (limited by thermally induced damage) and a peak-power of 2.17 MW at a pulse repetition rate of 15.7 MHz. Core pumping a 19 cm length of TDGF produced 2.3 W of average power and 16 MW peak-power pulses at 0.39 MHz. The performance is already comparable to the state of the art achieved with flexible silica fibers. Considering the rapid improvements in glass quality and the scope for further increasing the doping concentration, this fiber type holds great potential for pulsed fiber lasers in the 1.5-3 μm wavelength region.
0146-9592
Ren, Zhengqi
132134d5-1da7-494a-802a-08d7dd9f4451
Ben Slimen, Fedia
e25a8c47-a615-4199-bd24-40e71c3c2d1d
Lousteau, Joris
cab1e88f-197b-470a-90cb-a37c3141f66f
White, Nicholas
94c619a3-093f-4bbe-b313-b548a2435249
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Price, Jonathan HV
fddcce17-291b-4d01-bd38-8fb0453abdc8
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Ren, Zhengqi
132134d5-1da7-494a-802a-08d7dd9f4451
Ben Slimen, Fedia
e25a8c47-a615-4199-bd24-40e71c3c2d1d
Lousteau, Joris
cab1e88f-197b-470a-90cb-a37c3141f66f
White, Nicholas
94c619a3-093f-4bbe-b313-b548a2435249
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Price, Jonathan HV
fddcce17-291b-4d01-bd38-8fb0453abdc8
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491

Ren, Zhengqi, Ben Slimen, Fedia, Lousteau, Joris, White, Nicholas, Jung, Yongmin, Price, Jonathan HV, Richardson, David and Poletti, Francesco (2021) Compact chirped-pulse amplification systems based on highly Tm3+ doped germanate fiber. Optics Letters. (doi:10.1364/OL.422336). (In Press)

Record type: Article

Abstract

We report the fabrication of a dual cladding large mode area (LMA) thulium doped germanate fiber (TDGF). The fiber has a core diameter of 20 µm, a high Tm3+ ion concentration of 3×1020/cm3 and an hexagonal inner-cladding to enhance pump absorption when cladding pumped. Using short length of it, we demonstrate a compact 300 fs chirped-pulse amplification (CPA) system operating at 1925 nm, investigating both core- and cladding-pumped implementations. By cladding pumping a 65 cm length we produced an average power of 14.1 W (limited by thermally induced damage) and a peak-power of 2.17 MW at a pulse repetition rate of 15.7 MHz. Core pumping a 19 cm length of TDGF produced 2.3 W of average power and 16 MW peak-power pulses at 0.39 MHz. The performance is already comparable to the state of the art achieved with flexible silica fibers. Considering the rapid improvements in glass quality and the scope for further increasing the doping concentration, this fiber type holds great potential for pulsed fiber lasers in the 1.5-3 μm wavelength region.

Text
Accepted-manuscript - Accepted Manuscript
Available under License Creative Commons Attribution.
Download (758kB)

More information

Accepted/In Press date: 19 April 2021
Additional Information: My paper has just accepted now and I have only 48 hours for final proof reading. Please help me to provide a DOI number in your earliest convenience. Thank you !

Identifiers

Local EPrints ID: 448654
URI: http://eprints.soton.ac.uk/id/eprint/448654
ISSN: 0146-9592
PURE UUID: ca224e6d-81e5-49c7-9b4e-37858d9f464c
ORCID for Zhengqi Ren: ORCID iD orcid.org/0000-0003-1877-893X
ORCID for Yongmin Jung: ORCID iD orcid.org/0000-0002-9054-4372
ORCID for Jonathan HV Price: ORCID iD orcid.org/0000-0003-0256-9172
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: 29 Apr 2021 16:30
Last modified: 30 Apr 2021 01:51

Export record

Altmetrics

Contributors

Author: Zhengqi Ren ORCID iD
Author: Joris Lousteau
Author: Nicholas White
Author: Yongmin Jung ORCID iD
Author: Jonathan HV Price ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×