Design of AlGaInP visible lasers with a low vertical divergence angle

W. L. Li, Y. K. Su, S. J. Chang, C. S. Chang, C. Y. Tsai

Research output: Contribution to journalArticle

4 Citations (Scopus)


AlGaInP visible lasers with depressed index cladding layers are studied theoretically and experimentally. Using the above low-refractive-index layer, we can significantly improve the characteristics of the transverse beam divergence. According to our experimental results, the transverse beam divergence can be reduced from 41.4° to 26.2°. These values also agree well with our theoretical calculations. In addition, we have optimized this structure theoretically. With a proper choice of structure parameters, we can design an AlGaInP laser diode with a transverse divergence angle as narrow as 8° while maintaining a low threshold current density.

Original languageEnglish
Pages (from-to)87-90
Number of pages4
JournalSolid-State Electronics
Issue number1
Publication statusPublished - 1998 Jan 30

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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