Title :
Nonlinear analysis of surface-emitting distributed feedback lasers
Author_Institution :
Hughes Danbury Opt. Syst. Inc., CT, USA
fDate :
12/1/1990 12:00:00 AM
Abstract :
An analysis of surface-emitting distributed feedback lasers under conditions above threshold is presented. The coupled-wave equations are integrated numerically using a self-consistent technique that includes the effects of gain saturation, carrier diffusion, antiguiding, and free carrier loss. The laser threshold current and slope efficiency are determined as a function of the strip length and p-layer thickness where it is found that the device efficiency can be very high. Antiguiding, which varies when the grating is mistuned with respect to the gain peak, influences the slope, threshold, and shape of the emission far field. Small variations in the longitudinal index of refraction are shown to affect the far-field intensity profile significantly
Keywords :
diffraction gratings; distributed feedback lasers; laser theory; optical saturation; refractive index; semiconductor junction lasers; above threshold; antiguiding; carrier diffusion; coupled-wave equations; emission far field; far-field intensity profile; free carrier loss; gain peak; gain saturation; laser threshold current; longitudinal refractive index variations; mistuned laser diffraction gratings; p-layer thickness; slope efficiency; strip length; surface-emitting distributed feedback lasers; Distributed feedback devices; Gold; Gratings; Laser feedback; Laser modes; Optical refraction; Optical surface waves; Pump lasers; Surface emitting lasers; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
