Tuning curve of a water soluble laser dye, 490–530 nm

Optical, photo-physical properties and photostability of pyrromethene (PM-597) in ionic liquids as benign green-solvents

“…5. This decrease in gain with increasing PM-597 dye concentration beyond optimum concentration (1 Â 10 À 3 , 7 Â 10 À 4 and 3.5 Â 10 À 4 mol/L for PM-597 in BMIM Cl, BMIM BF 4 and EtOH, respectively) is because of the dye molecules quenching and aggregation effects [34][35][36] Under optimum concentration, the gain value of PM-597 increased because of the presence of the higher protonated form of PM-597.…”

Spectroscopic properties and amplified spontaneous emission of fluorescein laser dye in ionic liquids as green media

“…7. This decrease in the gain with increasing in dye concentration beyond optimum concentrations (1 Â 10 À4 , 1Â 10 À4 , 8 Â 10 À2 mol/L for fluorescein in BMIM AlCl 4 , BMIM BF 4 and EtOH) respectively because of the dye molecules quenching and aggregation [41][42][43]. In case of BMIM Cl, fluorescence intensity of fluorescein dye increased gradually with increasing dye concentration till 1 Â 10 À2 mol/L without getting optimum concentration so, its optimum gain may be at concentration higher than 1 Â 10 À2 mol/L.…”

Efficient lasing action from Rhodamine-110 (Rh-110) impregnated sol–gel silica samples prepared by dip method

“…There is a common observation that laser output intensity initially increases with concentration to reach a maximum and then decreases. This is attributed to the concentration quenching effect of dye molecules [25,[50][51][52][53]. The peak wavelength of laser spectrum shifts towards the longer wavelength side as the dye concentration increases (Fig.…”