Measurement of polarization properties of laser diodes

The paper deals with investigation of polarization in different types of laser diodes which can be used as sources of optical radiation for atmospheric optical communication systems. Results of laser beams study for different types of laser diodes and typical wavelengths are presented in the paper. Also possibility of laser beam transformation, from the type of polarization point of view, was studied as idea for improvement the immunity of laser beam towards the atmosphere conditions, mainly turbulence. Polarization properties of laser diodes were presented in the form of polar intensity diagrams and Stokes vectors represented on the Poincaré sphere.