Quantification of orbital instability of chaotic laser diode

Satoshi Ebisawa*, Joji Maeda, Shinichi Komatsu

*この研究の対応する著者

    研究成果査読

    3 被引用数 (Scopus)

    抄録

    We studied two methods that quantify the orbital instability of a laser diode (LD) in two typical chaotic systems. In one method, a coefficient named the orbital expansion exponent (OEE) is calculated from only the time series of the laser intensity. In the other method, the Lyapunov exponent is calculated from the rate equations. Then we compared the OEE and the Lyapunov exponent to discuss the appropriateness of the OEE. In an optical feedback LD system, the OEE cannot represent the dynamics of the chaotic LD satisfactorily for the large feedback ratio. However, when the LD has a larger drive current and the inherent parameters of the LD are dominant in the dynamics, the OEE represents the dynamics of the chaotic LD as well as the Lyapunov exponent. On the other hand, in an optical injection LD system, the correlation coefficient between the OEE and the Lyapunov exponent is large even if the injection ratio is large. To find the reason for this, we replaced the optical feedback system with a multistage optical injection system, and showed that the feedback terms prevent the OEE from accurately representing the orbital instability of a chaotic laser.

    本文言語English
    ページ(範囲)908-916
    ページ数9
    ジャーナルOptik
    172
    DOI
    出版ステータスPublished - 2018 11 1

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 原子分子物理学および光学
    • 電子工学および電気工学

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