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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...
A novel optical buffer memory with a shift register function is proposed. The buffer memory consists of a two- dimensional array of polarization-bistable vertical-cavity surface-emitting lasers (VCSELs), in which the bit state of the optical signal, "0" or "1" is stored as a lasing linear polarization state of 0 or 90deg. Input data stored as the polarization states of the first...
In this work we show that there can be transient growth of perturbations of a lasing state even for laser systems with orthogonal cavity modes. We show that whenever the background state is a lasing state, the linear stability operator has, in general, non-orthogonal modes. This means that the short term dynamics and the spectrum of the perturbations are always different from those predicted by a...
Optical set-reset operations of a bistable laser diode are performed using two light signals, which have the same wavelength but different intensities or pulse widths. The operations are based on optical pumping in the EL state and gain quenching in the lasing state by single-wavelength light.<<ETX>>
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