ABSORPTION SPECTRA OF EXCITED RUBY CRYSTALS

Abstract

We have investigated the absorption spectra of excited laser single crystals of ruby. The long‐lived increase in absorption depending on the degree of excitation is observed in optically excited crystals of ruby in a wide spectral range. Moreover, in the absorption spectrum of a post‐excited ruby we discovered the excitation‐induced long‐lived kinetic instability, namely, the noise‐like quasiline component variable in time and over the spectrum and imposed on the smooth spectral curve.