Title

Static Gain, Optical Modulation Response, And Nonlinear Phase Noise In Saturated Quantum-Dot Semiconductor Optical Amplifiers

Keywords

Gain recovery; Modulation response; Phase noise; Quantum dots (QDs); Semiconductor optical amplifiers (SOAs)

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. © 2009 IEEE.

Publication Date

5-12-2009

Publication Title

IEEE Journal of Quantum Electronics

Volume

45

Issue

5

Number of Pages

499-505

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/JQE.2009.2013100

Socpus ID

65149090179 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/65149090179

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