Measurements of partial derivativen/partial derivativeT for polymeric solid
-state dye-laser gain media have been performed. The method employed in the
se measurements is simple transmission of a laser beam, at minimum deviatio
n, through a gain matrix configured in a prismatic geometry. For rhodamine
6G-doped modified poly(methyl methacrylate) partial derivativen/partial der
ivativeT = - 1.4 +/- 0.2 x 10(-4) K-1 which is found to be a representative
value for dye-doped polymeric gain media.