Measurement of Gain Saturation Coefficients in Strained-Layer Multiple Quantum-Well Distributed Feedback Lasers

Hiroshi Yasaka, Kiyoto Takahata, Mitsuru Naganuma

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Gain saturation coefficients of unstrained- and strained-layer multiple quantum-well lasers were measured experimentally. These coefficients were higher in lasers that had compressive strain in their active-layer wells: 2.45 x 10-17 cm3 with unstrained wells and 12.6 x 10-17 cm3 with strained wells. The higher gain saturation coefficient in lasers with strained active-layer wells is related to their higher linear TE mode gain coefficient. The linearity factor (K factor) between a laser's damping constant and the square of the laser's resonant frequency decreased slightly with introducing the strain in laser's active layer wells. This factor, however, took the value of about 0.2 x 10-9 s for each of these lasers. The α parameter of these lasers was also estimated: 3.1 for an unstrained-layer multiple quantum-well laser and 1.1 for a laser with compressive strain in the active-layer wells.

Original languageEnglish
Pages (from-to)1294-1304
Number of pages11
JournalIEEE Journal of Quantum Electronics
Volume28
Issue number5
DOIs
Publication statusPublished - 1992
Externally publishedYes

Fingerprint

Distributed feedback lasers
distributed feedback lasers
quantum well lasers
Semiconductor quantum wells
saturation
Lasers
coefficients
lasers
Quantum well lasers
high gain
linearity
resonant frequencies
Natural frequencies
Damping
damping

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this

Measurement of Gain Saturation Coefficients in Strained-Layer Multiple Quantum-Well Distributed Feedback Lasers. / Yasaka, Hiroshi; Takahata, Kiyoto; Naganuma, Mitsuru.

In: IEEE Journal of Quantum Electronics, Vol. 28, No. 5, 1992, p. 1294-1304.

Research output: Contribution to journalArticle

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