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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 32, Iss. 27 — Sep. 20, 1993
  • pp: 5222–5229

Efficient radially polarized laser beam generation with a double interferometer

Steve C. Tidwell, Gerald H. Kim, and Wayne D. Kimura  »View Author Affiliations


Applied Optics, Vol. 32, Issue 27, pp. 5222-5229 (1993)
http://dx.doi.org/10.1364/AO.32.005222


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Abstract

Conversion of a linearly polarized CO2 laser beam into a radially polarized beam is demonstrated with a novel double-interferometer system. The first Mach–Zehnder interferometer converts the linearly polarized input beam into two beams with sin2 θ and cos2 θ intensity profiles, where θ is the azimuthal angle. This is accomplished by using two spiral-phase-delay plates with opposite handedness in the two legs of the interferometer to impart a one-wave phase delay azimuthally across the face of the beams. After these beams are interfered with, the resulting beams are sent directly into the second Mach–Zehnder interferometer, where the polarization direction of one beam is rotated by 90°. The beams are then recombined at the output of the second interferometer with a polarization-sensitive beam splitter to generate a radially polarized beam. The output beam is ≈ 92% radially polarized and contains ≈ 85% of the input power. This system will be used in upcoming laser particle acceleration experiments.

© 1993 Optical Society of America

History
Original Manuscript: October 13, 1992
Published: September 20, 1993

Citation
Steve C. Tidwell, Gerald H. Kim, and Wayne D. Kimura, "Efficient radially polarized laser beam generation with a double interferometer," Appl. Opt. 32, 5222-5229 (1993)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-32-27-5222

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