Research On Mid-IR Luminescence And Radiation Resistance Properties Of Chalcohalide Glasses

Chalcogenide glasses possess the lower phonon energy, the wider transmission window, the higher refractive index, the better chemical stability and thermal stability, chalcohanide glasses were believed to be the candidate materials for IR field application. This thesis presented an investigation on the rare earth doped chalcogelide glasses, and their spectral properties have been investigated. Its also represents recent developments on the studies of chalcogenide glass irradiation resistance properties and the influence of Υ-irradiation on the infrared transmisstion properties. The valueable results of this thesis are as follows:(1) Dy3+-doped and Dy3+/Tm3+-codoped glasses (72GeS2?18Ga2S3?10AgI) were investigated respectively. Their spectral properties excited at808nm have been investigated. In the Dy3+single-doped glasses, mid-IR emissions of2900nm and4300nm were hardly to be observed. In the Dy3+, Tm3+-codoped glasses, due to the energy transition, two main mid-IR emissions at2900nm and4300nm were found clearly, the σemi of2900and4300nm are calculated to be1.40×10-20cm2and1.52×10-20cm2for the0.8wt%Dy3+,0.5wt%Tm3+-codoped glass. The Dy3+, Tm3+-codoped chalcohalide glasses were believed to be potential materials for optical fiber amplifiers and mid-IR (mid-IR) laser devices.(2) Several chalcogenide glasses were synthesized and the influence of γ-irradiation on the infrared transmisstion properties was studied, the main emphasis of our research is select proper infrared materials which can apply in the radiation environment. Experimental results show that the infrared transmisstion bands of the chalcogenide glasses remain unchanged after the lower irradiation dose (1000rad/h,10h). It points that the radiation-resistant properties of Ge28Sb12Se60glass (after purification) change greatly at high dose (3000rad/h,10min), simultaneously appears the new absorption peak.