Title :
Lateral mode discrimination in surface emitting DBR lasers with cylindrical symmetry
Author :
Gong, X.M. ; Chan, A.K. ; Taylor, H.F.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
5/1/1994 12:00:00 AM
Abstract :
The effective reflectivity and the threshold gain of all lateral modes in a surface emitting DBR laser with cylindrical symmetry are analyzed using the coupled-mode approach. Our results indicate that when a cavity is designed for operation in the odd modes, all even modes are effectively eliminated. A small perturbation is introduced into the complex dielectric constant of the active region to suppress the unwanted lateral modes of odd symmetry. The model predicts that lasing will occur in a single mode with a narrow far-field pattern
Keywords :
distributed Bragg reflector lasers; laser cavity resonators; laser modes; laser theory; permittivity; reflectivity; semiconductor lasers; active region; cavity; complex dielectric constant; coupled-mode approach; cylindrical symmetry; effective reflectivity; even modes; lasing; lateral mode discrimination; narrow far-field pattern; odd modes; odd symmetry; single mode; small perturbation; surface emitting DBR lasers; threshold gain; unwanted lateral modes; Distributed Bragg reflectors; Distributed feedback devices; Gas lasers; Laser feedback; Laser modes; Laser theory; Optical feedback; Optical surface waves; Semiconductor lasers; Surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
