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Short single-frequency self-pulsing Brillouin-Raman distributed feedback fiber laser

Short single-frequency self-pulsing Brillouin-Raman distributed feedback fiber laser
Short single-frequency self-pulsing Brillouin-Raman distributed feedback fiber laser
We demonstrate that the stimulated Brillouin scattering of a 250 mm long distributed feedback Raman fiber laser can self-pulse with repetition rates up to 7 MHz, pulse widths of 25 ns, and peak powers of 1.2 W. While both CW and pulsed lasing are produced from a bespoke grating at 1119 nm this laser design could be constructed at almost any wavelength, as the Raman and Brillouin gain regions are relative to the pump wavelength. The laser has a low lasing threshold for a Raman laser of 0.55 W, a peak slope efficiency of 14 %, and a maximum average output of 0.25 W. An investigation of beating between pure Raman and Raman-pumped Brillouin lasing shows that the outputs of the two processes are highly correlated and thus the Brillouin lasing is essentially single-frequency when CW and near transform limited for pulsed operation. A phenomenological model of the Raman-Brillouin interaction shows that the pulsing behaviour of such a cavity is expected and produces very similar pulsing to that seen in experimental results.
1094-4087
12427-12439
Bannerman, Rex
7f7d5c3e-8e5d-45d5-8fd7-8d1511330e08
Smith, Devin H
49156a41-41f1-4f1b-8ce3-ef6f894e190c
Gray, Alan
26174255-455c-4db8-b11c-42c5827c5ee5
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Broderick, Neil G.R.
7a4d0b09-189a-4334-be7c-6afd80b7dc45
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Bannerman, Rex
7f7d5c3e-8e5d-45d5-8fd7-8d1511330e08
Smith, Devin H
49156a41-41f1-4f1b-8ce3-ef6f894e190c
Gray, Alan
26174255-455c-4db8-b11c-42c5827c5ee5
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Broderick, Neil G.R.
7a4d0b09-189a-4334-be7c-6afd80b7dc45
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Bannerman, Rex, Smith, Devin H, Gray, Alan, Gates, James C., Broderick, Neil G.R., Gawith, Corin and Smith, Peter G.R. (2022) Short single-frequency self-pulsing Brillouin-Raman distributed feedback fiber laser. Optics Express, 30 (8), 12427-12439. (doi:10.1364/OE.445876).

Record type: Article

Abstract

We demonstrate that the stimulated Brillouin scattering of a 250 mm long distributed feedback Raman fiber laser can self-pulse with repetition rates up to 7 MHz, pulse widths of 25 ns, and peak powers of 1.2 W. While both CW and pulsed lasing are produced from a bespoke grating at 1119 nm this laser design could be constructed at almost any wavelength, as the Raman and Brillouin gain regions are relative to the pump wavelength. The laser has a low lasing threshold for a Raman laser of 0.55 W, a peak slope efficiency of 14 %, and a maximum average output of 0.25 W. An investigation of beating between pure Raman and Raman-pumped Brillouin lasing shows that the outputs of the two processes are highly correlated and thus the Brillouin lasing is essentially single-frequency when CW and near transform limited for pulsed operation. A phenomenological model of the Raman-Brillouin interaction shows that the pulsing behaviour of such a cavity is expected and produces very similar pulsing to that seen in experimental results.

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Passively_Q_switching_Brillouin_Raman_distributed_feedback_fiber_hybrid_laser(1) - Accepted Manuscript
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Accepted/In Press date: 16 January 2022
e-pub ahead of print date: 29 March 2022
Published date: 11 April 2022
Additional Information: Funding Information: Innovate UK (104613, 50414); Engineering and Physical Sciences Research Council (EP/M024539/1, EP/T00097X/1); Royal Academy of Engineering. Corin Gawith's role in this project was supported by the Royal Academy of Engineering under the Research Chairs and Senior Research Fellowships scheme. Funding Information: Acknowledgments. Corin Gawith’s role in this project was supported by the Royal Academy of Engineering under the Research Chairs and Senior Research Fellowships scheme.

Identifiers

Local EPrints ID: 471505
URI: http://eprints.soton.ac.uk/id/eprint/471505
ISSN: 1094-4087
PURE UUID: 85c905a6-7f55-420c-80b1-65401dd12fc2
ORCID for Alan Gray: ORCID iD orcid.org/0000-0002-2316-8821
ORCID for James C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for Corin Gawith: ORCID iD orcid.org/0000-0002-3502-3558
ORCID for Peter G.R. Smith: ORCID iD orcid.org/0000-0003-0319-718X

Catalogue record

Date deposited: 09 Nov 2022 18:04
Last modified: 02 Dec 2022 02:37

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Contributors

Author: Rex Bannerman
Author: Devin H Smith
Author: Alan Gray ORCID iD
Author: James C. Gates ORCID iD
Author: Neil G.R. Broderick
Author: Corin Gawith ORCID iD

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