Influence of buried structure on polarization sensitivity in strained bulk semiconductor optical amplifiers

Takaaki Kakitsuka, Yasuo Shibata, Masayuki Itoh, Yoshiaki Kadota, Yuichi Tohmori, Yuzo Yoshikuni

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In order to achieve an accurate design of polarization-insensitive semiconductor optical amplifiers based on tensile-strained bulk InGaAsP, the reduction of strain in the active layer of the buried heterostructure and its influence on polarization sensitivity are analyzed numerically for the first time. The gain calculation, including the strain distribution in the active layer, is examined based on the k · p method for the different active layers. It is found that the strain introduced during the epitaxial growth is strongly reduced after regrowth of the burying layer. In an active layer having the aspect ratio of 1:4, the strain reduction causes more than a 0.5-dB deviation in the polarization sensitivity of the gain. From a comparison with the experimental results, it is shown that including the effect of the burying layer in the calculation gives an accurate determination of the amount of strain for the polarization independence.

Original languageEnglish
Pages (from-to)85-92
Number of pages8
JournalIEEE Journal of Quantum Electronics
Volume38
Issue number1
DOIs
Publication statusPublished - 2002 Jan 1

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Keywords

  • Gain
  • K·p
  • Polarization sensitivity
  • SOA
  • Strain

ASJC Scopus subject areas

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

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