Dynamics and linear stability analysis in semiconductor lasers withphase-conjugate feedback

摘要

Dynamics of semiconductor lasers with phase-conjugate feedback arenstudied. At a certain feedback level, the laser output evolves intonperiodic oscillations due to the undamped relaxation oscillation whichncorresponds to the highest mode of the linear stability analysis. Withnincreasing feedback level, the second mode is excited in quasi-periodicnoscillations. Though the second mode frequency in the conventionalnfeedback is almost the same as the external cavity mode frequency, thenfrequency in the phase-conjugate feedback is completely different fromnthat. We study the dynamics of the phase-conjugate feedback, showing thentime series, power spectrum, and attractors, and compare the resultsnwith those in the conventional feedback. The transition of the linearnmodes is also studied from the linear stability analysis. The resultsnderived from the linear stability analysis and the mode transition arencompatible with those of the simulations based on the rate equations