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Effect of internal optical loss on the modulation bandwidth of a quantum dot laser
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10.1063/1.3697683
/content/aip/journal/apl/100/13/10.1063/1.3697683
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/13/10.1063/1.3697683
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Modulation response function at different values of the internal loss cross-section σ int. For our calculations, room-temperature operation of a GaInAsP structure of Ref. 20 with a single layer of QDs lasing near 1.55 μm is considered; 10% QD-size fluctuations are assumed; g max = 29.52 cm−1. α 0 = 0 and L = 1.139 mm. For all the three curves, the dc component of the injection current density j 0 = 64 kA/cm2; for the case of no internal loss, this value of j 0 is equal to and that is why the response function is flattest. The inset shows the flattest response function given by Eq. (15) vs. normalized modulation frequency ; using this universal dependence and Eq. (12) for , the flattest response function at a non-zero σ int can be easily plotted.

Image of FIG. 2.
FIG. 2.

Modulation bandwidth vs. excess of the dc component of the injection current density over the threshold current density at different values of σ int. α 0 = 3 cm−1 and L = 1.139 mm. The “x” symbol marks the maximum point (, ) on each curve.

Image of FIG. 3.
FIG. 3.

Maximum modulation bandwidth vs. internal loss cross-section σ int. α 0 = 3 cm−1 and L = 1.139 mm; .

Image of FIG. 4.
FIG. 4.

Maximum modulation bandwidth vs. cavity length L. α 0 = 3 cm−1 and σ int = 2.67 × 10−17 cm2; L opt = 1.5 mm.

Image of FIG. 5.
FIG. 5.

Highest modulation bandwidth vs. internal loss cross-section σ int. α 0 = 3 cm−1. in the figure corresponds to L = ∞ and that is why it is larger than in Fig. 3.

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/content/aip/journal/apl/100/13/10.1063/1.3697683
2012-03-26
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of internal optical loss on the modulation bandwidth of a quantum dot laser
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/13/10.1063/1.3697683
10.1063/1.3697683
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