Title

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

Authors

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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