Nonlinear Phenomena in Complex Systems, 2008, Vol.11, No.4, pp.429-439

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2008, Vol.11, No.4, pp.429-439

Nonlinear Dynamics of Directly Modulated Quantum-Well Heterostructure Laser Diodes and Deviation of the Emission Frequency.
V.K.Kononenko, B.F.Kuntsevich, M.Marciniak

The numerical modeling of nonlinear dynamics of quantum-well semiconductor lasers with current modulation and the tuning of the radiation frequency within the gain band is established. The sweeping of the ``instantaneous'' frequency of the radiation connected with the change in the refractive index of the active medium resulted from variations of the current carrier concentration is examined. Limit cases of rather low and high frequencies of current modulation, were the sweeping of the radiation frequency approaches to zero, are determined. Maximum values (1000 GHz) of the sweeping at emitting the laser pulses reach in the intermediate range (1-2 GHz) of the modulation frequencies. In general, principal features of changes in the sweeping magnitude within the gain band correspond practically to the form of the envelope of the laser response.
Key words: quantum well, laser diode, current modulation, amplitude-detuning characteristic, frequency deviation

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