Comparative Study of Coumarin-120 (C-120) and Stilbine-3 (STB-3) Laser Dyes Doped in Sol-Gel Glasses

In 1967 the first work in solid state dye laser was performed by doping rhodamine dyes Polymethylmethacrylate (PMMA) materials. Since then some materials like various types of polymers, co-polymers, poly composite glasses have been used as host matrices for different dyes. Polymers suffer from limited mechanical and thermal stability. Hence can be alternative hosts. However, because high processing temperature leading to permanent destruction molecules, conventional glass preparation technique is not suitable introduction organic This difficulty overcome introducing molecules sol-gel which prepared at low temperature. Recent with shows that these may prove better compared polymeric being hard, best optically transparency Near UV-UV Visible region show photostability. this research we reported, comparative study photophysical properties Coumarin-120 (C-120) belonging 7-aminocoumarin family having two hydrogen atoms attached N atom 7-position, Stilbene-3 (STB-3) three HCl catalyzed SiO2 Method I, II III respectively.