“…The basic experimental results are given in Figure 7 and in Table II for indodicarbocyanine dye PD 643 in PUA. Its absorption spectrum ( 0 ), fluorescence ( 10), and absorption spectrum from the excited state (<rI2) calculated from the spectral dependencies of NA curves are also shown in Figure 7. The minimal photobleaching of dye is observed to be the excitation at the maximum of the absorption band; while at the Stokes and anti-Stokes regions the value of is 3-3.5 times as high.…”