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.
146-153
Ng, Siang Ping
284f8398-1642-45e3-9038-e60eecc71a60
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008
2013
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), .
(doi:10.1109/JQE.2012.2230396).
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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Published date: 2013
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 350039
URI: http://eprints.soton.ac.uk/id/eprint/350039
ISSN: 0018-9197
PURE UUID: 9a5f5a2e-f39b-4216-89c5-9dcf365c9759
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Date deposited: 15 Mar 2013 14:24
Last modified: 15 Mar 2024 03:07
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Author:
Siang Ping Ng
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