Quantum-well lasers can achieve a low spectral linewidth because of their high differential gain, leading to a lower linewidth enhancement factor alpha than for bulk lasers. The differential refractive index and the gain of InGaAs separate confinement multi-quantum-well lasers with two different quaternary barrier layers, have been determined from the spontaneous emission spectra below threshold. The measured value of the alpha factor is about 2.8 up to 3.5 at the gain maximum for both laser structures. The refractive index and the gain spectra are connected via the Kramers-Kronig relation. Therefore, the differential refractive index and the alpha factor have been deduced from calculated gain spectra with an additional contribution of the intraband transitions of the free carriers.
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页码:2467 / 2469
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Asada M., 1985, Transactions of the Institute of Electronics and Communication Engineers of Japan, Section E (English), VE68, P518
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PLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLANDPLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLAND
OSINSKI, M
BUUS, J
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PLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLANDPLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLAND
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PLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLANDPLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLAND
OSINSKI, M
BUUS, J
论文数: 0引用数: 0
h-index: 0
机构:
PLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLANDPLESSEY RES CASWELL LTD, ALLEN CLARK RES CTR, TOWCESTER NN12 8EQ, NORTHANTS, ENGLAND