Relationship between propagation loss and crystallinity in proton-exchanged and annealed LiNbO3 optical waveguides

Kenchi Ito, Kazumi Kawamoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The propagation loss of proton-exchanged and annealed LiNbO3 optical waveguides was studied in relation to the change in the crystal phase. With annealing at relatively low temperatures (≤325°C) or for a short time (at 375 or 400°C, ≤15 min), the propagation loss increases. Annealing at relatively high temperatures (375 to 400°C) for a longer time (30 to 45 min) greatly reduces the propagation loss. The reasons for the increase in propagation loss with insufficient annealing is the deterioration of crystallinity due to changes in the crystal phase and the coexistence of two different crystal phases.

Original languageEnglish
Pages (from-to)3977-3982
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume37
Issue number7
DOIs
Publication statusPublished - 1998 Jul

Keywords

  • Annealing
  • Crystallinity
  • LiNbO
  • Propagation loss
  • Proton exchange

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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