Differential gain and threshold current of 1.3 μm tensile-strained InGaAsP multi quantum well buried-heterostructure lasers grown by metalorganic molecular beam epitaxial growth

Masayuki Itoh, Hideo Sugiura, Hiroshi Yasaka, Yasuhiro Kondo, Kenji Kishi, Mitsuo Fukuda, Yoshio Itaya

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The laser characteristics of 1.3 μm tensile-strained InGaAsP/InP multi quantum well (MQW) lasers were studied. The tensile strain of well layers ranged from 0.5% to 1.8%. The level of the strain dependence of the threshold current shows that the threshold current decreases drastically with increase in the tensile strain from 0.5% to 1.3%, while it stays almost constant in the 1.45%-1.8% range. Among all the samples, the 1.3% tensile-strained MQW laser shows superior performance in terms of minimum threshold current and maximum differential gain (∂g/∂N). The 1.3% tensile strain is the optimum level for the tensile-strained MQW buried-heterostructure lasers.

Original languageEnglish
Pages (from-to)1553-1555
Number of pages3
JournalApplied Physics Letters
Volume72
Issue number13
DOIs
Publication statusPublished - 1998 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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