Title :
Design and performance optimization of optically-pumped mid-infrared intersubband semiconductor lasers
Author :
Wang, Jin ; Leburton, J.P. ; Julien, F.H. ; Saar, A.
Author_Institution :
Beckman Inst. for Adv. Sci. & Technol., Illinois Univ., Urbana, IL, USA
Abstract :
We show that self-consistent simulations of asymmetric coupled double-quantum wells (ACQW) can be used efficiently to increase significantly the optical performances of optically-pumped mid-infrared intersubband semiconductor lasers by increasing the electron concentration in the quantum well. Our calculations, which account for the screening effect and degenerate statistics, show optical gain in excess of 100/cm for pumping intensity of 39 kW/cm/sup 2/ can be achieved. Owing to hot electron effects, the stimulated gain at 77 K is insensitive to the phonon resonance for pumping intensities larger than 400 kW/cm/sup 2/.
Keywords :
laser transitions; optical design techniques; optical pumping; population inversion; quantum well lasers; stimulated emission; 77 K; asymmetric coupled double-quantum wells; degenerate statistics; design; electron concentration; hot electron effects; intersubband semiconductor lasers; optical gain; optical performances; optically-pumped mid-infrared lasers; performance optimization; phonon resonance; pumping intensities; pumping intensity; quantum well; screening effect; self-consistent simulations; stimulated gain; Electron optics; Optical coupling; Optical design; Optical pumping; Optimization; Pump lasers; Quantum well lasers; Semiconductor lasers; Statistics; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
