Anomalous dynamic characteristics of semiconductor quantum-dot lasers generating on two quantum states
- 1 January 2007
- journal article
- Published by Pleiades Publishing Ltd in Technical Physics Letters
- Vol. 33 (1), 4-7
- https://doi.org/10.1134/s1063785007010026
Abstract
Dynamics of the emission spectra of semiconductor quantum dot (QD) lasers generating on two quantum states has been experimentally studied. Being pumped with 30-ns current pulses, a QD laser ceased to generate 2–5 ns after switch-on and exhibited a pause up to 10 ns or longer, depending on the pumping pulse amplitude. After the subsequent switch-on, the laser generated short (200–300 ps) pulses of emission from the excited state of QDs followed by minima of comparable duration (dark pulses) corresponding to the ground-state emission. This behavior is explained in terms of the laser Q-switching due to the charge carrier density redistribution between the excited and ground states.Keywords
This publication has 4 references indexed in Scilit:
- Simultaneous two-state lasing in quantum-dot lasersApplied Physics Letters, 2003
- Ultrafast switch-off of an electrically pumped quantum-dot laserApplied Physics Letters, 2002
- Gain and threshold characteristics of long wavelength lasers based on InAs/GaAs quantum dots formed by activated alloy phase separationIEEE Journal of Quantum Electronics, 2001
- Observation of dark-pulse formation in gain-clamped semiconductor optical amplifiers by cross-gain modulationApplied Physics Letters, 1999