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Proceedings Paper

Efficient linear-to-radial polarization converter for high-power lasers
Author(s): G. Machavariani; S. Jackel; Y. Lumer; I. Moshe; A. Meir
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Paper Abstract

We describe design and performance of efficient linear-to-radial polarization and mode converter. The converter is a spatially variable retarder (SVR), comprised of eight appropriately cut half- wave plate segments. The SVRs were applied to perform two different tasks. First, a linearly polarized Nd:YAG TEM00 beam was converted into a radiallypolarized LG01* beam with polarization-purity of 98% and 96% measured in the near-field and far-field respectively. The total power-loss in the transformation was 18%. Second, a 70W Nd:YAG radially-polarized beam with beamquality M2=2.6 was converted into a linearly polarized nearly-Gaussian beam with beam-quality M2=1.4. Taking into account power-losses, the experimental beam-brightness was increased by a factor of 2.6. The SVR manufacture was optimized for application to high power lasers, where minimum phase-front distortion and maximum cylindrical- polarization purity is required. SVRs have so far been successfully tested to the kW level. The proposed converging methods can be of high practical importance due to unique properties of radially-polarized beams.

Paper Details

Date Published: 16 April 2008
PDF: 10 pages
Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69980L (16 April 2008); doi: 10.1117/12.780809
Show Author Affiliations
G. Machavariani, Soreq Nuclear Research Ctr. (Israel)
S. Jackel, Soreq Nuclear Research Ctr. (Israel)
Y. Lumer, Soreq Nuclear Research Ctr. (Israel)
I. Moshe, Soreq Nuclear Research Ctr. (Israel)
A. Meir, Soreq Nuclear Research Ctr. (Israel)

Published in SPIE Proceedings Vol. 6998:
Solid State Lasers and Amplifiers III
Jonathan A. Terry; Thomas Graf; Helena Jelínková, Editor(s)

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