We propose and numerically demonstrate that short cavity semiconductor laser with dual-optical-feed-back can stably generate broadband chaotic signal.Through theoretical analysis and comparison of the effects of the feedback factors on the dynamic characteristics of the laser with single-optical-feedback and dual-optical-feedback structure,it was found that the short cavity semiconductor laser with dual-optical-feedback can generate chaotic sig-nals within a large parameters range.The analysis of the signal characteristics of different output states of the laser shows that the laser with dual-optical-feedback structure evolves through a period-doubling bifurcation leading to cha-os.In addition,the influence of the feedback factors of the dual cavity on the bandwidth of the output signal was stud-ied,and it was identified that the bandwidth of the chaotic signal generated by the laser with dual-optical-feedback structure can reach over 10 GHz,and gradually increases with the increase of the feedback factors.
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