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Saeed Yazdani ¹, Esfandiar Rajaei ¹, Azam Shafieenezhad ¹

Affiliations
1 Department of Physics, University of Guilan, Rasht, IR

Abstract

The optical gain and output power of quantum dot (QD) lasers with different coverage factors and cavity lengths have been investigated as a function of injection current that show differences lasing from the ground state (GS) and exited state (ES) and in order to compare numerical results for turn on delay we have calculated photon density for ground state.

Keywords

Cavity Length, Coverage Factor, Output Power, Quantum Dot Lasers, Rate Equations.

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Azam Shafieenezhad ¹, Esfandiar Rajaei ¹, Saeed Yazdani ¹

Affiliations
1 Department of Physics, University of Guilan, Rasht, IR

Abstract

We have investigated the effects of inhomogeneous broadening on the three-state of InGaAs/GaAs quantum dot (QD) lasers. The Numerical models based on rate equations is presented with considering inhomogeneous broadening. We have calculated output power and optical gain that show differences lasing from the ground state and exited state and upper continuum state. The comparison between these three energy levels leads to a qualitative understanding for origin of the three-state lasing in InGaAs/GaAs QD lasers.

Keywords

Energy Level, Inhomogeneous Broadening, Output Power, Quantum Dot Lasers, Rate Equations.

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