Thermal lensing characterization of a high-radiance 946nm planar waveguide laser
Thermal lensing characterization of a high-radiance 946nm planar waveguide laser
We present the characterization of the in-plane thermal lens in a quasi-four-level Nd:YAG planar waveguide (PW) laser configured for high-radiance operation with an external stable-cavity. Our approach utilises the measurement of the laser's output irradiance distribution at the near- and far-field positions concurrently in order to obtain the "real time" beam propagation parameter and thus beam quality factor, M2. Coupled with the knowledge of the intra-cavity-thermal-lens- dependent beam sizes at an intra-cavity beam waist, the power dependent effective thermal lens focal length was characterized. A thermal lens focal length of >450 mm was obtained at all incident pump powers up to the maximum level of 87 W. This characterization enabled the build of a 29 W 946 nm PW laser with a record output radiance of 4.3 TWm-2sr-1.
diode-pumped, solid-state lasers, waveguide-laser, quasi-four-level, Nd:YAG
843303
Ng, S.P.
3c81341f-b5ea-43ed-bea3-c603c0fd380d
Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
1 June 2012
Ng, S.P.
3c81341f-b5ea-43ed-bea3-c603c0fd380d
Mackenzie, J.I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Ng, S.P. and Mackenzie, J.I.
(2012)
Thermal lensing characterization of a high-radiance 946nm planar waveguide laser.
SPIE Photonics Europe 2012, , Brussels, Belgium.
16 - 19 Apr 2012.
.
(doi:10.1117/12.922895).
Record type:
Conference or Workshop Item
(Paper)
Abstract
We present the characterization of the in-plane thermal lens in a quasi-four-level Nd:YAG planar waveguide (PW) laser configured for high-radiance operation with an external stable-cavity. Our approach utilises the measurement of the laser's output irradiance distribution at the near- and far-field positions concurrently in order to obtain the "real time" beam propagation parameter and thus beam quality factor, M2. Coupled with the knowledge of the intra-cavity-thermal-lens- dependent beam sizes at an intra-cavity beam waist, the power dependent effective thermal lens focal length was characterized. A thermal lens focal length of >450 mm was obtained at all incident pump powers up to the maximum level of 87 W. This characterization enabled the build of a 29 W 946 nm PW laser with a record output radiance of 4.3 TWm-2sr-1.
More information
Published date: 1 June 2012
Venue - Dates:
SPIE Photonics Europe 2012, , Brussels, Belgium, 2012-04-16 - 2012-04-19
Keywords:
diode-pumped, solid-state lasers, waveguide-laser, quasi-four-level, Nd:YAG
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 357234
URI: http://eprints.soton.ac.uk/id/eprint/357234
PURE UUID: 8decf2b8-3444-4840-8ce1-6721c155207c
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Date deposited: 16 Oct 2013 11:22
Last modified: 15 Mar 2024 03:07
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Contributors
Author:
S.P. Ng
Author:
J.I. Mackenzie
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