Near-stoichiometric Ti: Sc : LiNbO3 strip waveguide for integrated optics

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Xiao-Fei Yang
  • Zi-Bo Zhang
  • Wan-Ying Du
  • Qun Zhang
  • Wing-Han Wong
  • Dao-Yin Yu
  • De-Long Zhang

Detail(s)

Original languageEnglish
Pages (from-to)2637-2643
Journal / PublicationOptical Materials Express
Volume6
Issue number8
Publication statusPublished - Aug 2016

Abstract

We demonstrate near-stoichiometric Ti:Sc:LiNbO3 strip waveguide fabrication starting from a congruent LiNbO3 substrate with a technological process in sequence of Sc3+- diffusion-doping, Ti diffusion, and post Li-rich vapor transport equilibration. We show that the waveguide is in a near-stoichiometric composition environment, well supports singlemode propagation at 1.5 μm wavelength under both TE and TM polarizations, shows considerable polarization dependence, and has a loss ≤ 0.4/0.7 dB/cm for TE/TM mode. The Ti4+ surface profile can be fitted by a sum of two error functions, the depth profile can be fitted by a Gaussian function, and the Sc3+-profile part which has a concentration above the threshold of photorefractive damage entirely covers the waveguide, showing that the waveguide is expected to be optical-damage-resistant.

Citation Format(s)

Near-stoichiometric Ti: Sc : LiNbO3 strip waveguide for integrated optics. / Yang, Xiao-Fei; Zhang, Zi-Bo; Du, Wan-Ying; Zhang, Qun; Wong, Wing-Han; Yu, Dao-Yin; Pun, Edwin Yue-Bun; Zhang, De-Long.

In: Optical Materials Express, Vol. 6, No. 8, 08.2016, p. 2637-2643.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review