Fabrication of a glancing-angle-deposited distributed polarization rotator for ultraviolet applications

J. B. Oliver; S. MacNally; C. Smith; B. N. Hoffman; J. Spaulding; J. Foster; S. Papernov; T. J. Kessler

doi:10.1117/12.2312646

5 June 2018 Fabrication of a glancing-angle-deposited distributed polarization rotator for ultraviolet applications

J. B. Oliver, S. MacNally, C. Smith, B. N. Hoffman, J. Spaulding, J. Foster, S. Papernov, T. J. Kessler

Proceedings Volume 10691, Advances in Optical Thin Films VI; 106911C (2018) https://doi.org/10.1117/12.2312646
Event: SPIE Optical Systems Design, 2018, Frankfurt, Germany

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.

Citation Download Citation

J. B. Oliver, S. MacNally, C. Smith, B. N. Hoffman, J. Spaulding, J. Foster, S. Papernov, and T. J. Kessler "Fabrication of a glancing-angle-deposited distributed polarization rotator for ultraviolet applications", Proc. SPIE 10691, Advances in Optical Thin Films VI, 106911C (5 June 2018); https://doi.org/10.1117/12.2312646

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