Effect of homogeneous broadening of optical gain on lasing spectra in self-assembledInxGa1−xA

Carrier Dynamics and Saturation Effect in (113)B InAs/InP Quantum Dot Lasers

“…Experimental results are also compared to calculations derived from a numerical model. Let us note that a considerable work has already been devoted to model QD lasers based on InAs/GaAs system, consistent with TRPL (Bimberg et al 1997) and EL measurements (Bhattacharyya et al 1999, Sugawara et al 2000.…”

Coherent versus incoherent dynamics in InAs quantum-dot active wave guides

“…Thus, a different picture appears where QDs at room temperatures are significantly broadened by intrinsic mechanisms. This, on the one hand, reduces the expected superior performances based on a delta-like density of states in real QD lasers, on the other hand, it implies a different behavior in the laser action 6 where all the spectral gain participate to lasing, important for cw high-power applications. In view of this scenario, a better understanding of the processes associated with the observed homogeneous broadening in QDs at room temperature is crucial for further development of QD-based devices.…”

“…3 As cladding layers and a ridge structure of 8 m width and ϳ500 m length provide optical confinement and wave guiding. 6 The active region consists of three stacked layers of QDs separated by 21 nm thick GaAs barriers and placed in the center of a 120 nm GaAs layer. Electrical injection allowed laser action, 8,5 however in this work we concentrate on the QD absorption dynamics without bias current.…”

Effect of active medium inhomogeneity on lasing characteristics of InAs/InP quantum-dash lasers

“…The accomplishment of these low dimensional devices may also be ascribed to the theoretical modeling of these devices that has provided a great insight on their performance characteristics. For instance, the simulation model of quantum dot semiconductor lasers [4,5], the quantum well lasers [6] has helped in designing and fabrication of these structures for optimum performance.…”