Theoretical investigation of strain-compensated laser structures

ABSTRACT THEORETICAL INVESTIGATION OF STRAIN- COMPENSATED LASER STRUCTURES TOKTAMŞ, Hüseyin M.Sc, Engineering Physics Department Supervisor: Assoc. Prof Dr. Beşire GÖNÜL September 2002, 79 Pages The work described in this thesis is a theoretical investigation of the effect of strain compensation optical confinement factor, conduction- and valence- band offsets, allowed energy levels, transparency and threshold carrier density, peak gain and band line-ups. Different concepts for achieving strain-compensated quantum well structures emitting around 1.3 urn have been investigated. The study provides a better understanding of strain-compensated structures. The modeling of strain-compensated laser structures require a knowledge of the behavior of this novel structure in terms of gain characteristics. The work carried out in this thesis indicate that strain compensated compression active layers show better device performance compared to the strain compensated tension active layers. Key words: strain-compensated structures, compression, tension, optical confinement factor, optical gain. m