摘要
Self-chaotic dual-mode and tri-mode microcavity lasers have been recently proposed and demonstrated for highspeed random number generation.Here,we report the characteristics of irregular pulse packages and self-chaos operation for a dual-mode circular-sided square microcavity laser.In addition to the mode interaction between the fundamental and first-order transverse modes,we observed irregular pulse packages due to the mode beating of near-degenerate modes for the first time to our best knowledge.Moreover,a successive route from periodic-one and periodic-three states to chaos is first experimentally illustrated by increasing injection current.The chaotic state is observed over a current range of 10 mA,and the maximum chaos effective bandwidth of 22.4 GHz is realized with a flatness of±4 d B.Chaotic characteristics are also investigated for different longitudinal modes,which indicates that the self-chaotic microlaser can provide robust parallel chaotic outputs for practical application.
基金
National Natural Science Foundation of China(12274407,61874113,61935018,62122073)。
