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Thermal lensing characterization of a high-radiance 946nm planar waveguide laser

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
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, Belgium. 16 - 19 Apr 2012. p. 843303 . (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.

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Published date: 1 June 2012
Venue - Dates: SPIE Photonics Europe 2012, 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: https://eprints.soton.ac.uk/id/eprint/357234
PURE UUID: 8decf2b8-3444-4840-8ce1-6721c155207c
ORCID for J.I. Mackenzie: ORCID iD orcid.org/0000-0002-3355-6051

Catalogue record

Date deposited: 16 Oct 2013 11:22
Last modified: 10 Aug 2019 00:37

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Contributors

Author: S.P. Ng
Author: J.I. Mackenzie ORCID iD

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