Fabrication And Properties Of Novel Glasses For Near-and Mid-IR Luminescence

The near-and Mid-IR light source contains the communication band of 1-2 ?m and the molecular vibration fingerprint area of 3-5 ?m range.High-speed network and ultra-fast real-time information processing based on fiber-optic communication are becoming increasingly important in our daily life.And a number of important molecular characteristic lines that exist in the mid-IR band of 3-5 ?m range are being valuable in many applications,such as bio/chemical sensing,laser surgery,bio-medical care,and gas detection.The low-loss broadband fiber-optic gain material in the near-IR band has become one of the hottest topics in new material research area,so does the mid-IR laser material.In this thesis,we firstly introduced the study of transition metal Ni²⁺ doped super-broadband materials of oxyfluoride glass-ceramics,then the study on preparation and properties of Ni²⁺ doped chalcogenide glass,and finally the study on 1-4 ?m Near/Mid-IR luminescence of rare earth ions doped chalcogenide glass.It would provide some experimental basis for the future development of new Near/Mid-IR luminescent materials.In chapter one,the development of near-IR optical fiber communication is reviewed,including the history of the doping materials of transition metal ions and rare earth ions.And then,the development of chalcogenide glasses in mid infrared spectral region is discussed.Under this background,the purpose and main content of this thesis is proposed.In chapter two,the preparation process and characterization techniques of oxyfluoride glasses and sulfur glasses are introduced in detail,including DSC,spectrometer,FTIR,fluorescence spectroscopy,XRD,Raman spectroscopy,SEM,and so on.In chapter three,the luminescence of Ni²⁺-doped oxyfluoride glass-ceramics is introduced,which mainly includes the preparation of glass-ceramics,the identification of microcrystalline phases and the analysis of the luminescence spectra.It is found that the fluorescence spectra can be modified by controlling the composition and the crystal process,which can provide the basic data for the development of the compatible ultra broadband luminescence materials.In chapter four,the preparation and properties of transition metal Ni²⁺ doped chalcogenide glass-ceramics is studied,which mainly includes microstructure and optical properties of Ni²⁺ doped chalcogenide glasses.And the possible reasons for the failure of the luminescence of Ni²⁺ in chalcogenide glass-ceramics is discussed,which could be a reference for future investigations.In chapter five,the near-/mid-IR luminescence of rare-earth ions doped chalcogenide glass is studied,which mainly includes absorption spectra,fluorescence spectra and the energy levels of rare earth ions.The doping characteristics of rare earth ions doped with different rare earth ions in 1-4 ?m are first given,and the transition mechanism of related energy level is also described.In chapter six,the research results are summarized,and the shortages and the problems of the experiments in this work that need to be studied in future work are discussed.