This diploma thesis deals with optical and optoelectronic components. The first part describes three selected optical and three optoelectronic components. Optical components include power divider, isolator and circulator. The optoelectronic ones are laser diode, photodetector and modulator. Basic measurement parameters were defined for each component. In the experimental part, four components from different manufacturers were measured. Selected components are power dividers, isolators, circulators and a laser diode. Subsequently, the measured parameters were compared with the catalog values.