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Applied Optics

Applied Optics


  • Vol. 37, Iss. 7 — Mar. 1, 1998
  • pp: 1194–1204

High-quality Brewster’s angle polarizer for broadband infrared application

Daniel J. Dummer, Simon G. Kaplan, Leonard M. Hanssen, Alan S. Pine, and Yugin Zong  »View Author Affiliations

Applied Optics, Vol. 37, Issue 7, pp. 1194-1204 (1998)

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We have designed and constructed a linear polarizer for use with visible and infrared radiation. The broadband polarizer consists of four germanium plates arranged in a chevron geometry. Input radiation is incident near Brewster’s angle for the first plate such that the reflected beam is preferentially s-wave polarized. This reflected beam is steered subsequently to the successive plates, always intersecting near Brewster’s angle. The beam polarization at the output of the device is almost completely s-wave polarized. The ratio of the paraxial flux of the nearly extinguished p-wave polarized light to the s-wave polarized light transmitted through the device is found to be less than 10-5 for laser illumination at wavelengths of 0.633, 1.32, 3.39, and 10.6 μm. Calculations predict that extinction ratios less than 10-5 are achievable over the wavelength range from 0.4 μm to beyond 500 μm. Alternative design geometries involving fewer plates are also described along with their advantages and disadvantages.

© 1998 Optical Society of America

OCIS Codes
(230.5440) Optical devices : Polarization-selective devices
(260.3060) Physical optics : Infrared
(260.5430) Physical optics : Polarization

Original Manuscript: June 23, 1997
Revised Manuscript: October 14, 1997
Published: March 1, 1998

Daniel J. Dummer, Simon G. Kaplan, Leonard M. Hanssen, Alan S. Pine, and Yugin Zong, "High-quality Brewster’s angle polarizer for broadband infrared application," Appl. Opt. 37, 1194-1204 (1998)

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