Picosecond spectra of gain-switched AlGaAs/GaAs multiple quantum well lasers
The temporal waveform of the single longitudinal modes emitted by gain-switched AlGaAs/GaAs multiple quantum well lasers is analyzed by means of a synchroscan streak camera system coupled to a spectrograph. It is found that only 50% of the number of the longitudinal modes contributing to the time-averaged spectrum are present during the first relaxation oscillation. The time-dependent shift of the envelope of the mode spectrum is quantitatively explained by a spectral shift of the gain maximum as a function of the time-varying charge carrier density. The results demonstrate that, for the analysis of transient multimode spectra of gain-switched injection lasers, inclusion of the energy dependence of the gain and gain compression is mandatory.
- Research Organization:
- Institut fuer Festkoerperphysik I der Technischen Universitaet Berlin, Hardenbergstrasse 36, D-1000 Berlin 12, Federal Republic of Germany
- OSTI ID:
- 6707440
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 53:23; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
AMPLIFICATION
ARSENIC COMPOUNDS
ARSENIDES
CAMERAS
CARRIER DENSITY
GAIN
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
LASERS
MEASURING INSTRUMENTS
OPERATION
OSCILLATIONS
PNICTIDES
RADIATION DETECTORS
RELAXATION
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SPECTRAL SHIFT
STREAK CAMERAS