Spectrally and temporally resolved gain dynamics in mode locked semiconductor quantum well lasers
作者:
P. Milte´nyi,
M. Koch,
M. Hofmann,
H. Jung,
W. Elsa¨sser,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 12
页码: 1506-1508
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.118363
出版商: AIP
数据来源: AIP
摘要:
We perform measurements of the differential gain of modelocked semiconductor quantum well lasers over a wide spectral range employing a modified “electrical pump-optical probe” technique. We find that the two-dimensional density of states expresses itself significantly in the spectral dependence and value of the differential gain. Contributions of the second electronic level are observed in the high-energy range with an increasing in the differential gain, whereas a slightly decreasing differential gain with decreasing wavelength is observed in spectral regimes, where only the first quantized level contributes. ©1997 American Institute of Physics.
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