Two-dimensional analysis of self-sustained pulsation for narrow-stripe AlGaAs lasers

Masaaki Yuri*, James S. Harris, Toru Takayama, Osamu Imafuji, Hiroki Naito, Masahiro Kume, Kunio Itoh, Takaaki Baba

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Self-sustained pulsation in narrow-stripe geometry AlGaAs laser diodes is investigated numerically and experimentally. By taking account of the time-dependent two-dimensional optical field, carrier spreading in the cladding layers, and multilongitudinal modes, we succeeded in clarifying the mechanism for the pulsation. Fluctuation of the optical field plays an important role in forming saturable absorption. The numerical analysis clearly shows that our newly proposed real refractive index-guided structure is very suitable for a pulsation laser in which the optical field distribution and current spreading can be independently controlled. Furthermore, we show that the new structure gives much lower threshold current than that of a conventional loss-guided structure. These predicted advantages of the real refractive index-guided structure are verified experimentally with good agreement.

Original languageEnglish
Pages (from-to)473-479
Number of pages7
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number2
Publication statusPublished - 1995 Jun
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics


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