8.4 Hybrid Solid Dye Laser Glass Based on Energy Transfer Between Laser Dyes

With a specific laser dye, narrow linewidth laser output tunable in tens of nanometers can be obtained. ^[81], ^[95]- ^[97] The feasibility of a mixture dye laser was first demonstrated by O. G. Peterson et al. ^[98]. Energy transfer in laser dye mixture can improve the efficiency and broaden the tunable ranges. ^[99]- ^[100] Energy transfer dye lasers using numerous donor-acceptor pairs and the mechanisms have been extensively investigated. ^[101]- ^[107]

Recently, energy transfer from C440 and C500 to P-red, P-orange and P567 respectively in hybrid gel glasses was investigated in our lab. The energy transfer mechanisms between laser dyes and the effect of donor concentration on energy transfer were studied. The laser performances such as laser efficiency, tunable range and the photostability of the energy transfer dye laser media were also investigated. ^[108]- ^[109]

The fluorescence spectra of P-red doped in VTES-derived ORMOSILs in the absence and presence of C440 were presented in Fig. 8.9, and the variation of the peak fluorescence intensity of the acceptor with donor concentration was shown.

Figure 8.9: PL spectra of P-red doped in VTES-derived ORMOSILs in the absence and presence of C440 or C500. (solid: with C440 of 5.0 10 ^-4mol/l; dash: with C440 of 1.0 l0 ^-3mol/l; dot: with C440 of 2.0 10 ^-3mol/l; dash dot: without C440 or C500; dash dot dot: with C500 of 5.0 l0 ^-4mol/l)

Energy transfer...