TITLE:
Comparative Study of Coumarin-120 (C-120) and Stilbine-3 (STB-3) Laser Dyes Doped in Sol-Gel Glasses
AUTHORS:
Laxman V. Jathar, Milind Kulkarni, Dinesh Himatsinghani, Namrata Ajwani, Dilip G. Achalawat
KEYWORDS:
Sol-Gel Glass, Laser Dye, Coumarin-120 (C-120), Stilbine-3 (STB-3)
JOURNAL NAME:
New Journal of Glass and Ceramics,
Vol.11 No.3,
July
31,
2021
ABSTRACT: In 1967 the first work in solid state dye laser was performed by doping rhodamine dyes in Polymethylmethacrylate (PMMA) materials. Since thensomematerials like various types of polymers, co-polymers, polycomposite glasses have been used as host matrices for doping different laser dyes. Polymers suffer from limited mechanical and thermal stability. Hence glasses can be the alternative hosts. However, because of high processing temperature leading to permanent destruction of dye molecules,theconventional glass preparation technique is not suitable for the introduction of organic laser dyes. This difficulty can be overcome by introducing the laser dye molecules in sol-gel glass which is prepared at low temperature. Recent work with sol-gel glasses shows that these glasses may prove to be better materials compared to polymericmaterials because glasses being hard, best optically transparency in NearUV-UV and Visible region and show better photostability. In this research work we reported, comparative study of the photophysical properties of Coumarin-120 (C-120) belonging to 7-aminocoumarin family having two hydrogen atoms attached to the N atom at the 7-position, with Stilbene-3 (STB-3) in three types of HCl catalyzed SiO2sol-gel matrices prepared by Method I, Method II and Method III respectively.