High 90% efficiency Bragg gratings formed in fused silica by femtosecond Gauss-Bessel laser beams

M. Mikutis,T. Kudrius,G. Šlekys,D. Paipulas,S. Juodkazis

Published 2013 in Optical Materials Express

ABSTRACT

Direct laser write of volume Bragg gratings with diffraction efficiency (absolute) ∼90% is demonstrated using Gauss-Bessel laser beams in fused silica glass. Axial multiplexing of ∼ 90 μm long segments of modified optical material was demonstrated and thick Bragg gratings of aspect ratio depth/period ≈234 were achieved with period d = 1.5 μm. Typical fabrication scanning speeds were up to 50 mm/s for gratings with cross sections up to five millimeters made within 1 h time. Potential applications of high efficiency Bragg gratings in a low nonlinearity medium such as silica are discussed.

PUBLICATION RECORD

  • Publication year

    2013

  • Venue

    Optical Materials Express

  • Publication date

    2013-11-01

  • Fields of study

    Materials Science, Physics, Engineering

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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