Static Gain, Optical Modulation Response, and Nonlinear Phase Noise in Saturated Quantum-Dot Semiconductor Optical Amplifiers

    Authors

    X. X. Li;G. F. Li

    Abbreviated Journal Title

    IEEE J. Quantum Electron.

    Keywords

    Gain recovery; modulation response; phase noise; quantum dots (QDs); semiconductor optical amplifiers (SOAs); LINEWIDTH ENHANCEMENT FACTOR; LASERS; RECOVERY; Engineering, Electrical & Electronic; Optics; Physics, Applied

    Abstract

    A rate equation model preserving charge neutrality for quantum-dot semiconductor optical amplifiers (QD-SOAs) is established to investigate the nonlinear gain dynamics in the saturation regime. The static gain of QD-SOA is calculated assuming overall charge neutrality and compared with that without overall charge neutrality. Optical modulation response and nonlinear phase fluctuation through saturated QD-SOAs are calculated numerically based on a small-signal analysis. The gain dynamics of QD-SOAs are strongly dependent on the current injection level. The carrier reservoir in the wetting layer and continuum state is necessary for QD-SOAs to operate with high gain, high saturation power, and ultrafast gain recovery.

    Journal Title

    Ieee Journal of Quantum Electronics

    Volume

    45

    Issue/Number

    5-6

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    499

    Last Page

    505

    WOS Identifier

    WOS:000266454300009

    ISSN

    0018-9197

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