RESEARCH OF EMISSION SPECTRA OF SEMICONDUCTOR LASER DIODES IN THE RED COLOR RANGE

The article discusses quantum size effects (QSE) in semiconductor structures, specifically in quantum wells, where the dimensions of the structure are comparable to the de Broglie wavelength of charge carriers. The impact of quantum wells on the discretization of energy levels and the change in the density of states, which leads to a decrease in the threshold for laser emission is examined. The paper also presents the results of experiments measuring emission spectra to evaluate the emitting characteristics of laser diodes. A MDR-206 monochromator was used to analyze the dependence of the emission intensity on the wavelength at different current values. Laser diodes from various manufacturers, including companies from China, the USA, and Japan, were studied. The obtained data may be useful for improving the characteristics of laser diodes and optimizing their performance in operational current ranges.