Tapered laser diodes have emerged as a low-cost source for providing a high-output coherent beam, with applications including but not limited to telecommunications, printing and manufacturing, and medicine. The tapered geometry overcomes the poor beam quality issues that are faced by conventional high-power, broad-area laser diodes, while still maintaining compatibility with traditional fabrication processes. However, the tapered structure makes the design process significantly more complicated necessitating the need for a full 3D simulation including the optical, electronic and thermal effects.
Traditional simulation techniques used to model such devices either oversimplify the problem and can't deal with detrimental effects like spatial hole burning, filamentation, self-focusing, etc., or do a rigorous time-domain analysis, which is highly computationally intensive both in time and memory. The Tapered Laser (TL) Utility provides an efficient and accurate design tool for analyzing and optimizing such tapered laser diodes. It essentially combines, in a self-consistent manner, two of RSoft's mature and powerful simulation tools, BeamPROP and LaserMOD, to provide a full 3D simulation of tapered laser diodes. The quasi-3D electrical, quantum mechanical gain and thermal calculations are performed via LaserMOD, whereas the optical field is propagated via BeamPROP.