Abstract :
The threshold crossing inside a second-order distributed-Bragg reflector grating-coupled surface-emitting laser is theoretically investigated. The spontaneous emission field, looked upon as the driving source of the laser radiation, is described in a semi-classical way in the spectral domain. The gain, the source and possibly the refractive index, are saturated through amplified spontaneous emission, integrated over the whole spectral range of the main longitudinal mode. Simple expressions are obtained for both the laser intensity and linewidth as a function of the pump, which remain continuously valid across the threshold
Keywords :
diffraction gratings; distributed Bragg reflector lasers; laser modes; laser theory; quantum well lasers; refractive index; superradiance; surface emitting lasers; GaAs-AlGaAs; amplified spontaneous emission; distributed-Bragg reflector grating-coupled surface-emitting laser; gain; laser intensity; laser radiation; linewidth; main longitudinal mode; refractive index; second-order; semi-classical way; source; spectral domain; spontaneous emission field; threshold crossing;
