Title :
Spectral linewidth in oxide-confined vertical-cavity surface-emitting lasers
Author :
Debernardi, Pierluigi ; Fratta, Laura ; Bava, Gian Paolo
Author_Institution :
Politecnico di Torino, Italy
fDate :
8/1/2001 12:00:00 AM
Abstract :
We present a model to compute the linewidth in vertical-cavity surface-emitting lasers (VCSELs), by accounting for the 3-D structure of real devices. To this aim, we include the noise source in the field equations and treat both the noise and the structural characteristics by means of coupled-mode theory. In this way, we obtain an expression for the linewidth that is given as the standard relation, modified by two correction factors that account for spatial effects and modal dispersion of the resonator. In the numerical results, we study for oxide-confined VCSELs the transition from index to gain-guided regime, where the standard linewidth theory does not hold, and we give some guidelines for narrow-line emission devices
Keywords :
coupled mode analysis; laser cavity resonators; laser noise; laser theory; quantum well lasers; spectral line breadth; surface emitting lasers; 3-D structure; VCSELs; correction factors; coupled-mode theory; field equations; gain-guided regime; index-guided regime; model; narrow-line emission devices; noise source; numerical results; oxide-confined VCSELs; oxide-confined vertical-cavity surface-emitting lasers; resonator modal dispersion; spatial effects; spectral linewidth; Laser modes; Laser noise; Laser theory; Optical surface waves; Semiconductor device noise; Semiconductor lasers; Spontaneous emission; Surface emitting lasers; Surface treatment; Vertical cavity surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
