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Proceedings Paper

Development of an optical resonator with conical retroreflector for generation of radially polarized optical beam
Author(s): Masamori Endo
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Paper Abstract

Optical resonator for generation of high-power radially polarized beam is presented. In laser cutting applications, radially polarized beam is advantageous because the beam contacts the cut front always with the highly absorptive p-polarization. The proposed resonator comprises a reflector unit that has three conical faces with polarization sensitive dielectric coating, and an ordinary output coupler. The resonator is compatible with any existing circular mirror standing-wave optical resonators. Numerical simulation shows good polarization selectivity with only 1% of reflectivity difference between p and s polarizations, and M2 factor of the output beam is 1.9. No output power degradation is seen compared to the standard spherical mirror resonator. Design and fabrication of the resonator for a 1kW-class commercial cw CO2 laser is discussed.

Paper Details

Date Published: 7 February 2008
PDF: 10 pages
Proc. SPIE 6872, Laser Resonators and Beam Control X, 687207 (7 February 2008); doi: 10.1117/12.760570
Show Author Affiliations
Masamori Endo, Tokai Univ. (Japan)

Published in SPIE Proceedings Vol. 6872:
Laser Resonators and Beam Control X
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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