Education andsimulations withLaserCADIl

TheLaserCADIIIissoftware thathasbeen semiconductor materials including ternary, quatemary and developed forhighspeedsimulation ofbasecharacteristics quinary compounds. The numberof quantumwellis ofbulkand quantum-well semiconductor lasers. The unrestricted. algorithm ofthesoftware isbasedonmoderntheory of LaserCADIII allowsto investigate following semiconductor laserincluding rateequation, band characteristics: structure theory, gaintheoryandsemiconductor alloy engineering. LaserCADIII canbeapplied bothforscientific* Switching-on dynamics simulation andeducation aims. * Powervscurrent characteristics * Density ofstates I. INTRODUCTION * Dynamics intheSteady State * Modulation Characteristic Quantum well(QW)lasers areimportant components of * Gainspectrum thefiber-optical telecommunications. Thecomplexity ofthe * Electron andphoton density dynamics physical processes whicharerunning inthemretains these devices intheattention focus constantly. Theeffective method LaserCADIIIisbasedon optimized physical and forboththeinvestigation andstudy ofthefiber-optical systemsmathematical modelwhichgives qualitative correct results and andQW lasers isthenumerical simulation inparallel withdoesnotrequire manycomputational resources. Thecoreof experimental methods. Thesimulation allows todefine most mathematical modelisrateequations. Therateequations are physical parameters without complex andexpensive fabrication usedformodeling ofthemodulation anddynamics of ofexperimental setups andmeasurements. Therefore, theinvestigated structures. development ofthespecial simulation software forboththe Computation ofgainspectra isrealized byapplication of numerical investigation andadesign offiber-optical devices is theFermi's Golden Rule. Thisapproach requires knowing of important enough. carriers' energy spectra. Toobtain it, weusekp-method and Theaimofthis project iselaboration thesoftware foreffective massapproach inconnection withenvelope function solving oftasks ofthesemiconductor bandengineering and approximation. simulation ofmodernsemiconductor multiple quantum-well (MQW)lasers. -lli RA~. Bina. compound Themainexpected result oftheproject iSthesimulatorlS thatcombi1nes qualitlative result wIth Wlow CP W U time. Such An nBFVsaato fprmtr application mustbeanemulation ofexperiments inareaof rAxB1-)S eraycmon semiconductor laser physics.