Spot-size converter integrated semiconductor optical amplifiers for optical gate applications

Shotaro Kitamura, Hiroshi Hatakeyama, Kiichi Hamamoto, Tatsuya Sasaki, Keiro Komatsu, Masayuki Yamaguchi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A spot-size converter integrated semiconductor optical amplifier (SSC-SOA) was developed as a gate element in an optical switch matrix for photonic switching applications. By a selective metal-organic vapor phase epitaxy technique, a bulk InGaAsP stripe, including an active region and thickness tapered SSC's, was grown. Wavelength composition of the stripe, strain on the stripe, and electrode coverage above the SSC region were optimized. As a result, gate operation for fiber-to-fiber gain of 0 dB was achieved at a low injection current of 30 mA, and the polarization dependence of the gain was eliminated as well.

Original languageEnglish
Pages (from-to)1067-1074
Number of pages8
JournalIEEE Journal of Quantum Electronics
Issue number7
Publication statusPublished - Jul 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


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