Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers

被引:138
作者
Borri, P [1 ]
Langbein, W
Hvam, JM
Heinrichsdorff, E
Mao, MH
Bimberg, D
机构
[1] Tech Univ Denmark, Res Ctr COM, DK-2800 Lyngby, Denmark
[2] Univ Dortmund, Lehrstuhl Expt Phys EIIB, Dortmund, Germany
[3] Tech Univ Berlin, Inst Festkorperphys, D-1000 Berlin, Germany
关键词
amplifiers; modulators; quantum-dot lasers; ultrafast optics;
D O I
10.1109/68.849054
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The ultrafast dynamics of gain and refractive index in an electrically pumped InAs-InGaAs quantum-dot (QD) optical amplifier are measured at room temperature using differential transmission with femtosecond time resolution, Both absorption and gain regions are investigated. While the absorption bleaching recovery occurs on a picosecond time scale, the gain compression recovers with similar to 100-fs time constant, making devices based on such dots promising for high-speed optical communications.
引用
收藏
页码:594 / 596
页数:3
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