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Strain dependence of the linewidth enhancement factor in long-wavelength tensile- and compressive-strained quantum-well lasers

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6 Author(s)
Kimura, A. ; Optoelectron. Res. Lab., NEC Corp., Ibaraki, Japan ; Nido, M. ; Murata, S. ; Shimizu, J.-I.
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Values of the linewidth enhancement factor alpha in InGaAs/InGaAsP tensile- and compressive-strained quantum-well (QW) Fabry-Perot lasers are measured and compared to calculated values. The strain dependence of the measured values agrees with that of the calculated values: Values of alpha are smaller for tensile-strained QW lasers than for compressive-strained QW lasers, and alpha decreases with the increase of tensile or compressive strain. According to the model used in the calculation, short-wavelength-composition barriers reduce alpha in compressive-strained QW lasers, and alpha for such lasers is expected to be as low as that for the tensile-strained QW lasers.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:5 ,  Issue: 9 )