Comparison of photorefractive index change in proton-exchanged and Ti-diffused LiNbO3 waveguides

Takumi Fujiwara, Ramakant Srivastava, Xiaofan Cao, Ramu V. Ramaswamy

研究成果: Article査読

44 被引用数 (Scopus)

抄録

A quantitative comparison of the photorefractive effect in proton-exchanged (PE), annealed-proton-exchanged (APE), and Ti-diffused LiNbO3 waveguides in the visible region is reported. In the low-intensity region, the optically induced index change in PE/APE waveguides is almost 3 orders of magnitude smaller than that of Ti-diffused waveguides for a given intensity, primarily as a result of the increased dark conductivity owing to proton exchange. However, the photorefractive index change at higher intensities is almost the same for all the waveguides. Our results indicate that the optically induced space-charge field is relatively independent of the concentration or the valence state of iron impurities and the waveguide fabrication process.

本文言語English
ページ(範囲)346-348
ページ数3
ジャーナルOptics Letters
18
5
DOI
出版ステータスPublished - 1993 3月
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学

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