Preparation And Properties Of Solid State Tunable Laser Media Co-doped Dyes

Organic-inorganic hybrid solid-state optical materials and the related instruments is a new research field in materials and information science. Solid-state tunable dye laser has wide range of applications in many areas for its advantages including high laser output energy, broad tunable range, good beam quality and reliability, and miniaturization and has been studied intensively in recent years.In this work, various laser dyes were co-doped into ORMOSILs. The interaction and energy transfer mechanism of different kinds of co-doped dyes couples was studied using steady-state emission spectra, the UV-Vis absorption spectra, the time-resolve fluorescence spectra. The fluorescence and lasing properties of such energy transfer dye lasers have also been investigated.Energy transfer from C440 and C500 to p-orange and p-red and from p567 to p-red in ORMOSILs has been observed. The enhancement of the fluorescence intensity of the energy acceptor depends on two factors: the overlaps of the acceptor's absorption spectrum and the donor's emission spectrum; the intermolecular distance between the donor and the acceptor. The critical transfer distance R0 and the rate constant of energy transfer KET suggest that the mechanism is long-range dipole-dipole energy transfer as described by ForsterUnder the excitation of 532nm laser, the triplet state of p567 and p-red molecules are quenched by ground state C440 and C500 effectively, which improve the fluorescence intensity and the photostability of the energy acceptor. The photostability of p567 co-doped with C440 in ORMOSILs is improved 3 times under the irradiation of UV lamp.The influence of energy transfer on lasing properties such as the laser efficiency, the tunable range and the laser lifetime was also studied. The laser slope efficiency of p-red co-doped with C440 and C500 in ORMOS1L are improved by at least 1 time under excitation of 355nm laser pump source. The broad tunable range ol~ p-red co-doped with C440 and p567 in MTES is improved as wide as 58nm. from 586.12 to 613.42 nm. With the presence of C440 and p567. the laser lifetime of p-red in ORMOSILs is improved at least 1.5 times.