Title :
Unstable waveguiding in VCSELs
Author_Institution :
Gayton Photonics, Gayton, UK
Abstract :
It has been known for a long time that unstable waveguiding can occur in planar, gain guided stripe lasers. The possible existence of instabilities can be demonstrated by a very simple waveguide calculation. In this letter the demonstration of possible instabilities is extended to structures with cylindrical geometry. On the basis of these results it is concluded that unstable waveguiding may exist in cylindrical vertical cavity surface emitting lasers.<>
Keywords :
laser cavity resonators; laser theory; optical waveguide theory; optical waveguides; semiconductor lasers; stability; VCSELs; cylindrical geometry; cylindrical vertical cavity surface emitting lasers; instabilities; planar gain guided stripe lasers; unstable waveguiding; waveguide calculation; Equations; Geometrical optics; Optical materials; Permittivity; Photonics; Propagation constant; Surface emitting lasers; Surface waves; Vertical cavity surface emitting lasers; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
