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Frequency noise (FN) characteristic of 1.55 µm quantum dot (QD) lasers is investigated by introducing a theoretical model. A set of five rate equations are developed in presence of Langevin noise sources by writing a new equation for dynamics of the optical field phase. To investigate the effects of non-linear gain and direct carrier transition on FN spectrum of QD lasers, the auto and cross-correlation...
The impacts of gain compression and direct carrier transition on relative intensity noise (RIN) characteristics of 1.55µm QD lasers have been investigated theoretically. The auto and cross correlation coefficients are calculated through small signal linearization of rate equations for carriers and photon numbers in presence of Langevin noise sources. Calculations reveal that gain nonlinearity reduces...
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