Numerical Investigations On Wavelength-Tunable And Bandwidth-Controllable Chaotic Signal Generation Based On A Wrc-Fpld Subject To Fbg Filtered Feedback

In this paper, we propose a modified multi-mode rate equation model to numerically study the chaotic dynamics of a weak resonant-cavity Fabry-Perot laser diode (WRC-FPLD) subject to fiber Bragg grating (FBG) feedback. The simulated results show that, by adjusting the Bragg wavelength of FBG, different longitudinal mode of the WRC-FPLD can be chosen to become a lasing mode. Under suitable feedback strength, such a lasing mode can operate at a chaotic state, and the bandwidth of the chaotic signal increases firstly and then decreases with the increase of k, which is consistent with our previously reported experimental results. Furthermore, the influences of the reflected bandwidth of FBG and the frequency detuning between the central wavelength of FBG and the lasing longitudinal mode on the chaotic bandwidth are investigated systematically, and the results demonstrate that the wavelength and bandwidth of the chaotic signal can be controlled to a certain extent through adjusting the related parameters of FBG.