Optical coupling between partial resonators and its manifestation in the emission spectra of cadmium sulfide platelet lasers

An investigation was made of the spectral characteristics of the stimulated emission from cadmium sulfide platelet lasers (at T = 4.2, 77, and 360°K) in the case when one or several partial resonators were emitting. It was found that simultaneous stimulated emission from nearby partial resonators established an optical coupling as a result of which each resonator generated the same set of frequencies, the widths of the emission lines increased, and the spectrum was enriched with new mode maxima.