Conference paper
Ultrafast signal processing in quantum dot amplifiers through effective spectral holeburning
Significant progress has been obtained on quantum dot (QD) lasers, but the possible advantages of QD amplifiers are not yet clear. We show here that a relatively slow coupling between the optically active QD carrier states and the surrounding carrier reservoir can lead to efficient gain modulation suitable for ultrafast signal processing.
The basis of this property is that the process of spectral hole burning (SHB) can become very effective. We consider a traveling wave optical amplifier consisting of the dot states, which interact with the optical signal (no inhomogeneous broadening included), and the wetting layer (WL), where current is injected.
Time evolution is described by two coupled rate equations. Carrier capture from WL to dots is characterized by the capture time /spl tau//sub 0/.
| Language: | English |
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| Publisher: | IEEE |
| Year: | 2002 |
| Pages: | 662 vol.1 |
| Proceedings: | Conference on Lasers and Electro-Optics 2002 |
| ISBN: | 1557527067 and 9781557527066 |
| Types: | Conference paper |
| DOI: | 10.1109/CLEO.2002.1034452 |
| ORCIDs: | Mørk, Jesper |
Optical amplifiers Optical coupling Optical modulation Optical signal processing Quantum dot lasers Quantum dots Reservoirs Signal processing Stimulated emission Ultrafast optics capture time carrier capture coupled rate equations dot states effective spectral holeburning efficient gain modulation high-speed optical techniques laser theory optical hole burning optical information processing optical modulation optical signal optically active QD carrier states quantum dot amplifiers quantum dot lasers relatively slow coupling semiconductor optical amplifiers spectral hole burning surrounding carrier reservoir time evolution traveling wave optical amplifier ultrafast signal processing wetting layer
