Numerical simulation of chaotic multimode dynamics of a semiconductor laser optical coupled with two external cavities

The dynamics of a double-reflector external cavity semiconductor laser (D-ECSL) system operating multimode with moderate feedback is given for every laser active mode by Lang-Kobayashi set of equations describing the rates of variation of the internal field and carrier density. The developed multimode model simulates a system with 3 active modes (3 coupled single-mode systems). All modes are coupled having the same feed source, but evolving under different feedback conditions (feedback coefficient and round-trip time of the external cavity). The time series of the emission power represent the summing of the signals generated by the three modes. The numerical results show that the developed numerical multimode model simulates with good approximation the chaotic dynamic of D-ECSL system for a specific set of parameter values. © 2021, Politechnica University of Bucharest. All rights reserved.