Title :
Electrical versus optical pumping of quantum dot amplifiers
Author :
Berg, Tommy W. ; Bischoff, Svend ; Mørk, Jesper
Author_Institution :
Res. Center COM, Lyngby, Denmark
Abstract :
The influence of the pumping mechanism for the dynamical properties of quantum dot amplifiers is investigated for 10, 40 and 160 GHz signals. A fast response is predicted in the case of optical pumping in the wetting layer (WL). The combination of fast relaxation and capture times and the presence of a reservoir of carriers in the WL opens up for the possibility of ultrafast gain recovery in QD devices. The strength of optical contra electrical pumping is that it reduces the bottleneck effect of a slow WL. Optical pumping thus allows significant improvement of the dynamical properties of QD devices.
Keywords :
laser theory; optical pumping; quantum well lasers; semiconductor optical amplifiers; semiconductor quantum dots; 10 GHz; 160 GHz; 40 GHz; bottleneck effect; capture times; dynamical properties; electrical pumping; fast relaxation times; fast response; optical pumping; quantum dot amplifiers; ultrafast gain recovery; wetting layer; Energy states; Optical amplifiers; Optical pumping; Optical scattering; Optical signal processing; Quantum dots; Semiconductor optical amplifiers; Stimulated emission; US Department of Transportation; Ultrafast optics;
Conference_Titel :
Optical Communication, 2001. ECOC '01. 27th European Conference on
Print_ISBN :
0-7803-6705-7
DOI :
10.1109/ECOC.2001.989419
