1.3 μm InAsP p-type modulation doped MQW lasers grown by gas-source molecular-beam epitaxy

被引:0
|
作者
Shimizu, H. [1 ]
Kumada, K. [1 ]
Yamanaka, N. [1 ]
Iwai, N. [1 ]
Mukaihara, T. [1 ]
Kasukawa, A. [1 ]
机构
[1] The Furukawa Electric Co., Ltd., Yokohama RD Labs., 2-4-3 O., Yokohama 220, Japan
来源
Journal of Crystal Growth | 1999年 / 201卷
关键词
Current density - Heterojunctions - Quantum well lasers - Secondary ion mass spectrometry - Semiconducting indium compounds - Semiconductor doping;
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摘要
We investigated the effect of p-type modulation doping on the laser performance in 1.3 μm InAsP compressively strained MQW lasers grown by gas-source molecular beam-epitaxy (GSMBE) for the first time. A sharp modulation doping profile of beryllium was confirmed by secondary ion mass spectroscopy. A very low threshold current of 6 mA was obtained for buried heterostucture lasers doped with 5×1018 cm-3 of 300 μm-long cavity with cleaved facets. By using p-type MD-MQW lasers, the gain coefficient was confirmed to increase by about 100 cm-1 compared to undoped MQW lasers from the measurement of cavity length dependence of threshold current density. Further, differential gain was confirmed to increase by a factor of 1.34 from the relative intensity noise spectrum.
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页码:896 / 900
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