Generation of multikilowatt radially or azimuthally polarized CO2 laser beams by a triple-axicon optical resonator

Masamori Endo

doi:10.1117/12.839664

17 February 2010 Generation of multikilowatt radially or azimuthally polarized CO₂ laser beams by a triple-axicon optical resonator

Masamori Endo

Author Affiliations +

Proceedings Volume 7579, Laser Resonators and Beam Control XII; 75790F (2010) https://doi.org/10.1117/12.839664
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

A 2kW cylindrically polarized laser beams by using a triple-axicon optical resonator is demonstrated. The rear mirror of a commercial CO₂ laser is replaced by the optical component that is composed of a waxicon and an axicon accurately fitted together. Selection of the polarization is made by the reflectivity difference between p and s polarizations at the inclined surfaces. The reflectivity is designed to r_s>r_p so that the resonator is oscillated in azimuthally polarized mode. The output beam is converted to radially polarized beam by a converter composed of four λ/4 phase retarders. The polarization conversion efficiency is 98.5% and the power conversion efficiency is 95%.

Citation Download Citation

Masamori Endo "Generation of multikilowatt radially or azimuthally polarized CO₂ laser beams by a triple-axicon optical resonator", Proc. SPIE 7579, Laser Resonators and Beam Control XII, 75790F (17 February 2010); https://doi.org/10.1117/12.839664

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