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Study of emission characteristics in laser dye mixtures encapsulated in silica gel matrices

✍ Scribed by Meenakshi Sharma; D. Mohan; R.D. Singh; Nageshwar Singh

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
401 KB
Volume
30
Category
Article
ISSN
0925-3467

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✦ Synopsis

The fluorescence emission characteristics of two different laser grade dye combinations: Rhodamine 6G (R6G) co-doped with disodium fluorescien (FDS) and sulforhodamine B (SFB) co-doped with FDS in tetra-ethyl-ortho-silicate (TEOS) using sol-gel technique are studied upon excitation under copper vapor laser (CVL). Energy transfer from FDS (donor) to R6G and SFB (acceptors) respectively, are observed by varying acceptor concentration in the range from $0.3 mM to $5 mM. The related parameters such as peak emission wavelength, FWHM, lifetime of excited states, quantum yield and energy transfer rate constants of molecules in combination in silica gel matrices are determined. Dye combination shows the improved fluorescence photo-stability in silica doped samples.

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