Analysis of low-reflection facet film for semiconductor optical amplifiers using ablation etching

Tatsuya Takeshita, Kazutoshi Kato, Mitsuru Sugo

Research output: Contribution to journalArticle


The reflectivity of a facet film for semiconductor optical amplifiers (SOAs) has been analyzed using laser ablation etching, which changes the ripple of spectrum light. We propose a method of estimating the optimum thicknesses of TiO2 and SiO2 layers by observing the change in reflectivity after ablation etching. We used this method to estimate the optimum thicknesses and reduce reflectivity, while bringing the thicknesses close to their optimum values. Ablation etching is a promising technique for analyzing facet reflectivity after facet coating.

Original languageEnglish
Pages (from-to)6922-6926
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number9 A
Publication statusPublished - Sep 7 2006
Externally publishedYes


All Science Journal Classification (ASJC) codes

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

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