Novel technique for mode selection in a multimode fiber laser
Novel technique for mode selection in a multimode fiber laser
A simple technique for transverse mode selection in a large-mode-area (multimode) fiber laser is described. The technique exploits the different spectral responses of feedback elements based on a fiber Bragg grating and a volume Bragg grating to achieve wavelength-dependent mode filtering. This approach has been applied to a cladding-pumped thulium-doped fiber laser with a multimode core to achieve a single-spatial-mode output beam with a beam propagation factor (M2) of 1.05 at 1923 nm. Without mode selection the free-running fiber laser has a multimode output beam with an M2 parameter of 3.3. Selective excitation of higher order modes is also possible via the technique and preliminary results for laser oscillation on the LP11 mode are also discussed along with the prospects for scaling to higher power levels
12434-12439
Daniel, J.M.O.
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Chan, J.S.P.
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Kim, J.W.
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Sahu, J.K.
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Ibsen, M.
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Clarkson, W.A.
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June 2011
Daniel, J.M.O.
b6ad5413-bcb3-4699-9f19-2fb88d96fb7a
Chan, J.S.P.
7339d99a-1d44-4313-91a7-8d2452b21069
Kim, J.W.
43f1b0c3-5a59-4449-a56a-386668bd061a
Sahu, J.K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Ibsen, M.
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Daniel, J.M.O., Chan, J.S.P., Kim, J.W., Sahu, J.K., Ibsen, M. and Clarkson, W.A.
(2011)
Novel technique for mode selection in a multimode fiber laser.
Optics Express, 19 (13), .
(doi:10.1364/OE.19.012434).
Abstract
A simple technique for transverse mode selection in a large-mode-area (multimode) fiber laser is described. The technique exploits the different spectral responses of feedback elements based on a fiber Bragg grating and a volume Bragg grating to achieve wavelength-dependent mode filtering. This approach has been applied to a cladding-pumped thulium-doped fiber laser with a multimode core to achieve a single-spatial-mode output beam with a beam propagation factor (M2) of 1.05 at 1923 nm. Without mode selection the free-running fiber laser has a multimode output beam with an M2 parameter of 3.3. Selective excitation of higher order modes is also possible via the technique and preliminary results for laser oscillation on the LP11 mode are also discussed along with the prospects for scaling to higher power levels
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oe-19-13-12434
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Published date: June 2011
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 191497
URI: http://eprints.soton.ac.uk/id/eprint/191497
ISSN: 1094-4087
PURE UUID: a20d0c36-5742-44a8-98f0-2bb03dc5d1e6
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Date deposited: 21 Jun 2011 14:33
Last modified: 15 Mar 2024 03:09
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Author:
J.M.O. Daniel
Author:
J.S.P. Chan
Author:
J.W. Kim
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