Optical-confinement-factor dependencies of the K factor, differential gain, and nonlinear gain coefficient for 1.55 μm InGaAs/InGaAsP MQW and strained-MQW lasers

J. Shimizu, H. Yamada, S. Murata, A. Tomita, M. Kitamura, A. Suzuki

研究成果: Article査読

45 被引用数 (Scopus)

抄録

Optical-confinement-factor Γ dependencies of the K factor, differential gain dg/dN, and nonlinear gain coefficient e, for 1.55 μm InGaAs/InGaAsP multiple-quantum-well (MQW) and compressively strained MQW lasers, were investigated experimentally. For both MQW and strained-MQW lasers, when Γ is increased, the K factor is reduced, dg/dN is increased but e is almost constant. These results indicate that the Γ dependence of the K factor mainly results from a change in dg/dN, and does not result from a change in ∊. For the strained MQW lasers, the K factor, dg/dN and ∊ are, respectively, half as large, twice as large and the same as those for the MQW lasers, when both types of lasers have the same r (= 0.05). This suggests that the strained MQW lasers with a large Γ are expected to have a small K factor and thus be preferable in achieving large modulation bandwidths.

本文言語English
ページ(範囲)773-776
ページ数4
ジャーナルIEEE Photonics Technology Letters
3
9
DOI
出版ステータスPublished - 1991 9
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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