Preparation and Characterization of Fluorphosphate Glasses Doped with Ho～(3+)/Tm～(3+)/Yb～(3+) Ions

Preparation and Characterization of Fluorphosphate Glasses Doped with Ho～(3+)/Tm～(3+)/Yb～(3+) Ions
　　In this thesis, fluoride, fluorphosphate and phosphate glass doped with rare earth ions were studied in order to gain 2 micrometer emission laser amplified material for the high-power solid-state laser. The rare earth ions and their concentrations were also researched.The orthogonal design was introduced in order to contrive the basic glass compositions. The host glass, the rare earth magnets maximal rare-earth doped concentration, the best doped rate and the laser activities of the Ho3+/Tm3+ doped fluorphosphate glass has been researched and discussed systematically. But the Ho3+/Tm3+doped laser system is less used ,in the result of the 790nm pumping source,
　　which wave-length does not belong to the commercial LD laser. In order to increase the laser amplified materials practicability, Ho3+/Tm3+/Yb3+ doped system had been introduced, for using the 980nm commercial LD laser as the pumping source in this way.At present, few research on the microcrystalline treatment of laser glass has been carried out. The advantages of the laser crystal and glass can be combined with together in this way. Furthermore the laser http://www.chinamagnets.biz/ amplified material, gained by this method, has the higher pumping efficiency, lower phonon coupled level and better machine-shaping capability. Experiment results indicated that the best microcrystalline treatment conditions were found to be 520℃ for 6h and the workable cooling process was annealed to 200℃ at the rate 0.35℃/min and then lowed to the room temperature naturally.