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Zirconium-diffusion-doped Ti:LiNbO3 strip waveguide for integrated optics

  • De-Long Zhang*
  • , Jian Kang
  • , Qun Zhang
  • , W. J. Du
  • , W. H. Wong
  • , E. Y. B. Pun
  • *Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Abstract

We report Zr4+-doped Ti:LiNbO3 strip waveguide fabricated by Zr4+-diffusion-doping followed by diffusion of 8 μm wide, 100 nm thick Tistrips on a Z-cut congruent substrate. Optical study shows that the waveguide well supports both TE and TM, is single-mode at the 1.5 μm wavelength, and has a loss ≤ 1.3/1.5 dB/cm for the TE/TM mode. Secondary ion mass spectrometry study shows that the Zr4+-profile part having a Zr4+-concentration above the threshold of photorefractive damage covers 60% (70%) ordinary (extraordinary) index profile in the waveguide. We conclude that the waveguide is optical-damage-resistant.
Original languageEnglish
Pages (from-to)1715-1721
JournalOptical Materials Express
Volume5
Issue number8
Online published6 Jul 2015
DOIs
Publication statusPublished - 1 Aug 2015

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