Laserinduced thermal blooming in rectangular waveguides
Abstract
Steadystate thermal blooming in perfectly conductive rectangular waveguides is described by the coupling between the Helmholtz equation and the diffusion equation without convection. The fields are pinned at the walls by Dirichlet and Neumann conditions and the temperature by Dirichlet conditions. The equations are solved by Green's functions in a perturbation scheme employing the Born approximation. The firstorder solutions indicate that only about 4 percent of the energy is transferred from the unperturbed mode, as defined by a constant index of refraction, to all the higherorder modes for moderate absorption.
 Publication:

Journal of the Optical Society of America B Optical Physics
 Pub Date:
 October 1985
 DOI:
 10.1364/JOSAB.2.001603
 Bibcode:
 1985JOSAB...2.1603P
 Keywords:

 Laser Outputs;
 Optical Waveguides;
 Propagation Modes;
 Rectangular Waveguides;
 Thermal Blooming;
 Born Approximation;
 Energy Transfer;
 Green'S Functions;
 Perturbation Theory;
 Steady State;
 Lasers and Masers;
 WAVEGUIDES;
 THERMAL BLOOMING;
 LASERS