Amplification combination of Er3+ and Tm3+ emissions in titanium-diffused lithium niobate strip waveguide

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

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Author(s)

  • Yun Zhang
  • Chao-Yang Zhang
  • Wen-Bao Sun
  • Zi-Bo Zhang
  • De-Long Zhang
  • Wing-Han Wong

Detail(s)

Original languageEnglish
Pages (from-to)457-463
Journal / PublicationJournal of Luminescence
Volume198
Online published30 Mar 2018
Publication statusPublished - Jun 2018

Abstract

Erbium(Er)/thulium(Tm)-codoped active lithium niobate(LiNbO3) channel waveguides were fabricated by titanium diffusion following erbium/thulium co-diffusion doping in an X-/Z-cut LiNbO3 substrate with an initial congruent/Li-deficient composition. We show that the waveguide is in an initial congruent or Li-deficient composition environment, remains LiNbO3 crystalline phase, is monomode at the 1.5 µm wavelength region under either the transverse electric or the transverse magnetic polarization, and has a loss < 0.5 dB/cm. The X-cut/Z-propagation scheme can effectively suppress the photorefractive effect, while the Z-cut/Y-propagation scheme cannot. Codoping with thulium effectively promotes the resistance to optical damage. An optical gain of 0.8/0.1 dB/cm is attained for the 1547(erbium)/1450(thulium) nm small-signal, showing that erbium/thulium codoping enables to combine the emissions of the two ions and realize the S+C+L broadband amplification or lasing by using 980 and 795 nm laser diodes as the pump sources.

Research Area(s)

  • Optical amplifier, Ti:Er:Tm:LiNbO3 strip waveguide

Citation Format(s)

Amplification combination of Er3+ and Tm3+ emissions in titanium-diffused lithium niobate strip waveguide. / Zhang, Yun; Zhang, Chao-Yang; Sun, Wen-Bao et al.

In: Journal of Luminescence, Vol. 198, 06.2018, p. 457-463.

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