We develop a generalized coupled-mode model for multistripe index-guided laser arrays that includes explicitly the influence of carrier-induced antiguiding, gain guiding, and carrier diffusion in the gain stripe. As an illustration of an application of the model, stability criteria for two-element laser arrays are derived that show that the phase-locked solution is intrinsically unstable. We find that the phase-locked solution can be stabilized at a low external injection-locking power at the suitably chosen injection-locking frequency. We have tested our model in the large carrier-diffusion case and still find good qualitative agreement between the coupled-mode model and a full coupled partial differential equation model.
© 1993 Optical Society of America
Original Manuscript: April 27, 1992
Revised Manuscript: October 14, 1992
Published: March 1, 1993
P. Ru, P. K. Jakobsen, J. V. Moloney, and R. A. Indik, "Generalized coupled-mode model for the multistripe index-guided laser arrays," J. Opt. Soc. Am. B 10, 507-515 (1993)