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Wavelength dependence of the modal refractive index in 1.3 μm InGaAsP, AlGaInAs and GaInNAs lasers using high pressure
Author(s) -
Jin S. R.,
Sweeney S. J.,
Adams A. R.,
Higashi T.,
Riechert H.,
Thijs P. J. A.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301608
Subject(s) - lasing threshold , refractive index , laser , wavelength , materials science , optoelectronics , optics , modal , physics , polymer chemistry
We report the variation of the modal refractive index at threshold with lasing wavelength in 1.3 μm InGaAsP, AlGaInAs and GaInNAs multiple quantum well lasers by measuring mode spectra under pressure up to 15 kbar. It is shown that the decrease of index with lasing wavelength is about 4% on average in the pressure range studied. We also find that the modal refractive index reduces with increasing injection current and is very sensitive to the injection current around laser threshold.