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Planar waveguide laser optimization and characterization employing real-time beam quality measurement

Planar waveguide laser optimization and characterization employing real-time beam quality measurement
Planar waveguide laser optimization and characterization employing real-time beam quality measurement
We present a methodology for optimizing the output radiance and characterizing a planar waveguide laser utilizing a technique offering "real time" beam quality measurement. This approach is applicable to lasers in general employing the simultaneous measurement and comparison of a re-imaged cavity-mode beam-waist (near-field) and the power distribution in the far-field (specifically in the Fourier plane of a lens). This approach provides the laser’s beam parameter product, and hence M2 beam propagation factor. Exploiting this technique we optimized the performance of a quasi-four-level Nd:YAG planar waveguide laser with an extended stable-cavity configuration, whilst characterizing the in-plane thermal lens. This laser produced a record radiance level of >9 TW/m2/sr for this 946 nm transition, with an effective thermal lens focal length >400 mm at all incident pump powers up to the maximum level of 87 W.
0018-9197
146-153
Ng, Siang Ping
284f8398-1642-45e3-9038-e60eecc71a60
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Ng, Siang Ping
284f8398-1642-45e3-9038-e60eecc71a60
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008

Ng, Siang Ping and Mackenzie, Jacob I. (2013) Planar waveguide laser optimization and characterization employing real-time beam quality measurement. IEEE Journal of Quantum Electronics, 49 (2), 146-153. (doi:10.1109/JQE.2012.2230396).

Record type: Article

Abstract

We present a methodology for optimizing the output radiance and characterizing a planar waveguide laser utilizing a technique offering "real time" beam quality measurement. This approach is applicable to lasers in general employing the simultaneous measurement and comparison of a re-imaged cavity-mode beam-waist (near-field) and the power distribution in the far-field (specifically in the Fourier plane of a lens). This approach provides the laser’s beam parameter product, and hence M2 beam propagation factor. Exploiting this technique we optimized the performance of a quasi-four-level Nd:YAG planar waveguide laser with an extended stable-cavity configuration, whilst characterizing the in-plane thermal lens. This laser produced a record radiance level of >9 TW/m2/sr for this 946 nm transition, with an effective thermal lens focal length >400 mm at all incident pump powers up to the maximum level of 87 W.

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More information

Published date: 2013
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 350039
URI: https://eprints.soton.ac.uk/id/eprint/350039
ISSN: 0018-9197
PURE UUID: 9a5f5a2e-f39b-4216-89c5-9dcf365c9759
ORCID for Jacob I. Mackenzie: ORCID iD orcid.org/0000-0002-3355-6051

Catalogue record

Date deposited: 15 Mar 2013 14:24
Last modified: 20 Jul 2019 01:06

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Author: Siang Ping Ng

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