Abstract
ZnSe quantum dot (QD) semiconductor optical amplifier (SOA) is studied theoretically using net gain for linear Absorption coefficient and linear emission and these results are used to calculate noise figure and small-signal gain.
Highlights
Quantum dot photonic materials have attracted much attention in recent years as they have the potential to deliver the stability and coherence of atomic sources within a compact and efficient semiconductor device. characteristics such as reduced sensitivity to optical feedback makes such materials attractive as laser sources
[1] Quantum dot (QD) semiconductor optical amplifiers (SOAs) demonstrate best features when compared with other SOAs based on bulk or quantum well materials
quantum dot (QD) SOAs are very promising for applications in high-speed optical communications
Summary
Quantum dot photonic materials have attracted much attention in recent years as they have the potential to deliver the stability and coherence of atomic sources within a compact and efficient semiconductor device. characteristics such as reduced sensitivity to optical feedback makes such materials attractive as laser sources. Suppression of pattern effects in QD semiconductor optical amplifiers (SOAs) shown to be promises for high speed application. The understanding of the high speed carrier dynamics of these materials is crucial for their optimization and exploitation. To address this issue, time resolved spectroscopy has been used to investigate the fundamental carrier decay time scales of SOA structures and determine their suitability for high-speed applications. Time resolved spectroscopy has been used to investigate the fundamental carrier decay time scales of SOA structures and determine their suitability for high-speed applications Such pump-probe studies are usually performed using pulse width of a few hundred femtoseconds to picoseconds in order to sufficiently resolve the relaxation dynamics of high-speed devices. Energy levels are calculated using quantum box model where the dot is assumed in the form a cube with quantum dot size is 10 × 10 × 10 nm3. net gain is calculated by using linear Absorption coefficient and linear emission coefficient components in the QD
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