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Efficient Ho:YAG laser pumped by a cladding-pumped tunable Tm:silica-fibre laser

Efficient Ho:YAG laser pumped by a cladding-pumped tunable Tm:silica-fibre laser
Efficient Ho:YAG laser pumped by a cladding-pumped tunable Tm:silica-fibre laser
Highly efficient room-temperature operation of a Ho:YAG laser end pumped by a cladding-pumped tunable Tm-doped silica-fibre laser operating at 1905 nm is reported. Using a simple two-mirror resonator configuration, we obtained 6.4 W of unpolarized output at 2097 nm in a diffraction-limited TEM00 beam (with M2 ~ 1.1) for 9.6 W of incident pump power, corresponding to a slope efficiency with respect to incident pump power of 80% and an optical-to-optical efficiency of 67%. Using a folded-resonator configuration incorporating a Brewster-angled glass plate, we obtained 5.8 W of linearly polarized TEM00 output, corresponding to an optical-to-optical efficiency of ~60%. Due to low quantum defect heating, the depolarization loss due to thermally induced birefringence in the Ho:YAG crystal was <0.14% at the maximum available pump power, indicating that there is scope for further power scaling.
0946-2171
559-561
Shen, D.Y.
f9a1bd01-6f5c-428a-83fb-3a8b2dadbaad
Abdolvand, A.
afdd5ceb-903f-4eb0-8c8b-9d418763e07d
Cooper, L.J.
249c1748-92f2-42aa-9cbc-0e4f5dcc3bf9
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Shen, D.Y.
f9a1bd01-6f5c-428a-83fb-3a8b2dadbaad
Abdolvand, A.
afdd5ceb-903f-4eb0-8c8b-9d418763e07d
Cooper, L.J.
249c1748-92f2-42aa-9cbc-0e4f5dcc3bf9
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2

Shen, D.Y., Abdolvand, A., Cooper, L.J. and Clarkson, W.A. (2004) Efficient Ho:YAG laser pumped by a cladding-pumped tunable Tm:silica-fibre laser. Applied Physics B: Lasers and Optics, 79 (5), 559-561. (doi:10.1007/s00340-004-1562-y).

Record type: Article

Abstract

Highly efficient room-temperature operation of a Ho:YAG laser end pumped by a cladding-pumped tunable Tm-doped silica-fibre laser operating at 1905 nm is reported. Using a simple two-mirror resonator configuration, we obtained 6.4 W of unpolarized output at 2097 nm in a diffraction-limited TEM00 beam (with M2 ~ 1.1) for 9.6 W of incident pump power, corresponding to a slope efficiency with respect to incident pump power of 80% and an optical-to-optical efficiency of 67%. Using a folded-resonator configuration incorporating a Brewster-angled glass plate, we obtained 5.8 W of linearly polarized TEM00 output, corresponding to an optical-to-optical efficiency of ~60%. Due to low quantum defect heating, the depolarization loss due to thermally induced birefringence in the Ho:YAG crystal was <0.14% at the maximum available pump power, indicating that there is scope for further power scaling.

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Published date: 7 July 2004

Identifiers

Local EPrints ID: 13897
URI: http://eprints.soton.ac.uk/id/eprint/13897
ISSN: 0946-2171
PURE UUID: cd5f8d62-ea1f-4322-be00-35f015f688dd

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Date deposited: 12 Jan 2005
Last modified: 21 Sep 2021 16:32

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