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Characterisation and laser performance of a Yb:LuAG double-clad planar waveguide grown by pulsed laser deposition

Characterisation and laser performance of a Yb:LuAG double-clad planar waveguide grown by pulsed laser deposition
Characterisation and laser performance of a Yb:LuAG double-clad planar waveguide grown by pulsed laser deposition

We report on the fabrication of a crystalline multi-layer lutetium aluminium garnet planar waveguide, with a ytterbium-doped core, via hetero-epitaxial pulsed laser deposition on an undoped yttrium aluminium garnet substrate. Physical and optical characterization of the device revealed good crystallinity of the grown films and mode propagation investigations confirmed waveguiding properties. The measured fluorescence lifetime and calculated absorption and stimulated emission cross section spectra are found to be comparable with those reported for Yb:LuAG crystals grown by traditional methods. When end-pumped by a diode-laser bar, the crystalline double-clad Yb:LuAG planar waveguide lased using a quasi-monolithic cavity configuration. An output power of > 3 W with a 20% slope efficiency was obtained, limited by a waveguide propagation loss of 1.2 dB cm−1. This first demonstration of a multi-layer LuAG double-clad planar waveguide laser shows great potential for realising compact high-power waveguide lasers and amplifiers.

0946-2171
Kurilchik, Sergey V.
0b3cfff0-6d23-4568-bbf6-4204790993de
Prentice, Jake J.
a053f4e8-3ebd-4625-a703-fc7b03f54e9c
Eason, Robert W.
e38684c3-d18c-41b9-a4aa-def67283b020
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Kurilchik, Sergey V.
0b3cfff0-6d23-4568-bbf6-4204790993de
Prentice, Jake J.
a053f4e8-3ebd-4625-a703-fc7b03f54e9c
Eason, Robert W.
e38684c3-d18c-41b9-a4aa-def67283b020
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008

Kurilchik, Sergey V., Prentice, Jake J., Eason, Robert W. and Mackenzie, Jacob I. (2019) Characterisation and laser performance of a Yb:LuAG double-clad planar waveguide grown by pulsed laser deposition. Applied Physics B, 125 (11). (doi:10.1007/s00340-019-7314-9).

Record type: Article

Abstract

We report on the fabrication of a crystalline multi-layer lutetium aluminium garnet planar waveguide, with a ytterbium-doped core, via hetero-epitaxial pulsed laser deposition on an undoped yttrium aluminium garnet substrate. Physical and optical characterization of the device revealed good crystallinity of the grown films and mode propagation investigations confirmed waveguiding properties. The measured fluorescence lifetime and calculated absorption and stimulated emission cross section spectra are found to be comparable with those reported for Yb:LuAG crystals grown by traditional methods. When end-pumped by a diode-laser bar, the crystalline double-clad Yb:LuAG planar waveguide lased using a quasi-monolithic cavity configuration. An output power of > 3 W with a 20% slope efficiency was obtained, limited by a waveguide propagation loss of 1.2 dB cm−1. This first demonstration of a multi-layer LuAG double-clad planar waveguide laser shows great potential for realising compact high-power waveguide lasers and amplifiers.

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Accepted/In Press date: 23 September 2019
e-pub ahead of print date: 12 October 2019
Published date: 1 November 2019

Identifiers

Local EPrints ID: 435415
URI: https://eprints.soton.ac.uk/id/eprint/435415
ISSN: 0946-2171
PURE UUID: b5ac1ac7-ee14-4968-bd3e-63a12462b095
ORCID for Sergey V. Kurilchik: ORCID iD orcid.org/0000-0002-6444-5709
ORCID for Robert W. Eason: ORCID iD orcid.org/0000-0001-9704-2204
ORCID for Jacob I. Mackenzie: ORCID iD orcid.org/0000-0002-3355-6051

Catalogue record

Date deposited: 06 Nov 2019 17:30
Last modified: 19 Nov 2019 02:02

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