Today laser measuring systems and sets, interferometers and other measuring units, which principle of operation is based on the use of stabilized laser radiation sources, are actively used to solve urgent problems in metrological laboratories of advanced enterprises of various industries and in leading scientific institutes. This article discusses the research results of a number of stabilized radiation sources with the aim of using them as working standards. The research was carried out on the basis of the D.I. Mendeleyev Institute for Metrology (next VNIIM).