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Efficient fiber-laser pumped Ho:LuLiF4 laser

Efficient fiber-laser pumped Ho:LuLiF4 laser
Efficient fiber-laser pumped Ho:LuLiF4 laser
We present results for an efficient Ho:LuLiF4 laser in-band pumped by a cladding-pumped Tm-doped silica fiber laser. The polarized, tunable Tm-doped silica fiber-laser operates at 1938 nm, ideally suited for in-band pumping the 40 mm long weakly-doped (0.25 at.%) Ho:LuLiF4 crystal. Using a simple laser resonator a maximum output power of 5.1 W was achieved at a wavelength of 2066 nm for 8.0 W of absorbed pump power, when using an output coupling mirror with 20% transmission, corresponding to a slope efficiency of 70%. At a higher cavity output coupling of 37%, the lasing wavelength shifted to a higher gain peak at 2053 nm, where a maximum output power of 5.4 W was obtained with a slope efficiency of 76%. Beam quality was measured to be M2~1.1 at the maximum output power for each resonator configuration. The spectroscopy, lifetime of the upper laser level, and the laser performance will be discussed in terms of future prospects for power scaling and further improvements in the laser efficiency.
Kim, J.W.
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Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Parisi, D.
beaba3c2-7943-4196-8efc-76199e50e56f
Veronesi, S.
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Tonelli, M.
eb60f888-4899-46c5-b208-e43d0dd460c7
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Kim, J.W.
3d0ba669-a721-4922-ab5b-a73e2f81816a
Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Parisi, D.
beaba3c2-7943-4196-8efc-76199e50e56f
Veronesi, S.
0c429e49-55e6-487c-943a-f7f13b31ba47
Tonelli, M.
eb60f888-4899-46c5-b208-e43d0dd460c7
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2

Kim, J.W., Mackenzie, J.I., Parisi, D., Veronesi, S., Tonelli, M. and Clarkson, W.A. (2010) Efficient fiber-laser pumped Ho:LuLiF4 laser. Photonics Europe (EPE 10), Belgium. 12 - 16 Apr 2010.

Record type: Conference or Workshop Item (Paper)

Abstract

We present results for an efficient Ho:LuLiF4 laser in-band pumped by a cladding-pumped Tm-doped silica fiber laser. The polarized, tunable Tm-doped silica fiber-laser operates at 1938 nm, ideally suited for in-band pumping the 40 mm long weakly-doped (0.25 at.%) Ho:LuLiF4 crystal. Using a simple laser resonator a maximum output power of 5.1 W was achieved at a wavelength of 2066 nm for 8.0 W of absorbed pump power, when using an output coupling mirror with 20% transmission, corresponding to a slope efficiency of 70%. At a higher cavity output coupling of 37%, the lasing wavelength shifted to a higher gain peak at 2053 nm, where a maximum output power of 5.4 W was obtained with a slope efficiency of 76%. Beam quality was measured to be M2~1.1 at the maximum output power for each resonator configuration. The spectroscopy, lifetime of the upper laser level, and the laser performance will be discussed in terms of future prospects for power scaling and further improvements in the laser efficiency.

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More information

e-pub ahead of print date: April 2010
Additional Information: 7721A-29
Venue - Dates: Photonics Europe (EPE 10), Belgium, 2010-04-12 - 2010-04-16
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 340700
URI: https://eprints.soton.ac.uk/id/eprint/340700
PURE UUID: b400d144-2ffd-4884-99e6-468cff663f17
ORCID for J.I. Mackenzie: ORCID iD orcid.org/0000-0002-3355-6051

Catalogue record

Date deposited: 02 Jul 2012 14:11
Last modified: 08 Oct 2019 00:49

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