<title>Modeling of distortions in optical characteristics of semiconductor lasers due to noise in MBE growth temperature measurement</title>

Abstract

Maintaining cladding layer material composition uniformity is inherently difficult during high temperature MBE growth of GaAs/AlGaAs laser structures. These non-uniformities can lead to asymmetrical waveguiding structures with distorted optical output characteristics of the laser. Distortions in optical characteristics can greatly affect the alignment and the coupling efficiency between laser diodes and optical fiber or other electro-optical systems in integrated opto-electronic applications. A two-dimensional dielectric waveguide simulator has been used to analyze the optical properties of GRINSCII GaAs/A1GaAs lasers with asymmetrical cladding structures. Through this analysis, we have demonstrated an optimal laser device structure which has the desired optical characteristics and is less sensitive to cladding composition asymmetries arising in typical growth conditions.