Continuously tunable energy transfer laser operation in four-dye mixture systems

Theoretical as well as experimental investigation of the energy transfer dye laser (ETDL) operation has been performed, aimed at development of a dye laser which covers a wide wavelength range without exchanging a dye mixture. the following two dye mixtures are shown to be very effective: Rhodamine 6(R6G)-Safrain.T(ST)-Cresyl Violet (CV)-Nile Blue(NB) and Coumarin 1(C1)- Acriflavine(A)-Uranine(U)-R6G. Their desirable dye concentrations are derived and the tuning characteristics are measured. Conclusively, a continuous tuning was achieved over 130 nm in either case, and hence almost the entire visible range is covered with these two ETDL's.