The study of spectroscopic prperties of polymers thin film doped by organic dye laser

The absorption and fluorescence spectra of coumarin 522 in chloroform at a different concentration (1x10-s,5xl0-u,1110*; mole/liter was studied .The quantum efficiency and radiation lifetime and oscillator strength were measured for every concentration . The absorption and fluorescence spectra of PMMA films doped with coumarin 522 mixtures at a different concentration (5x10r,1x10- Sxt0-) mole/litter were studied and quantum efficiency measurement for the film were 687o,71o ,787o respectively