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Proceedings Paper

Fabrication of a glancing-angle-deposited distributed polarization rotator for ultraviolet applications
Author(s): J. B. Oliver; S. MacNally; C. Smith; B. N. Hoffman; J. Spaulding; J. Foster; S. Papernov; T. J. Kessler
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Paper Abstract

Glancing-angle–deposited thin films are used to fabricate half-wave plates in a 1-D striped geometry, forming alternating regions of linearly polarized light on a single 100-mm-diam substrate. MgO is selected for fabricating the birefringent films for use in vacuum, based on its formation of isolated columns that avoid potential tensile-stress failure of the porous film. While large-area tests have shown high defect densities for fluences <10 J/cm2 , small-spot laser-damage testing has shown resistance to fluences up to 30 J/cm2 (351-nm, 5-ns pulse). An amorphous silica film is investigated to match the optical thickness in the intermediate regions in an effort to fabricate a polarizationcontrol device to reduce focal-point modulation (“beam smoothing”) in high-intensity laser systems. Ongoing efforts to improve the laser-damage threshold and minimize optical losses caused by scatter are essential to realizing a practical device. Scalability of the process to meter-scale substrates is also explored.

Paper Details

Date Published: 5 June 2018
PDF: 6 pages
Proc. SPIE 10691, Advances in Optical Thin Films VI, 106911C (5 June 2018); doi: 10.1117/12.2312646
Show Author Affiliations
J. B. Oliver, Univ. of Rochester (United States)
S. MacNally, Univ. of Rochester (United States)
C. Smith, Univ. of Rochester (United States)
B. N. Hoffman, Univ. of Rochester (United States)
J. Spaulding, Univ. of Rochester (United States)
J. Foster, Univ. of Rochester (United States)
S. Papernov, Univ. of Rochester (United States)
T. J. Kessler, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 10691:
Advances in Optical Thin Films VI
Michel Lequime; H. Angus Macleod; Detlev Ristau, Editor(s)

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