Dissertation > Excellent graduate degree dissertation topics show

Preparation and Study of High-gain Coefficient Yb3+-doped Tellurite Laser Glass

Author: XuShenNuo
Tutor: PengBo
School: Xi'an Optics and Fine Mechanics
Course: Optical Engineering
Keywords: Tellurite laser glass Boro-tellurite glass Bismuthate glass Rareearth doped materials Reciprocity method
CLC: TQ171.1
Type: Master's thesis
Year: 2013
Downloads: 4
Quote: 0
Read: Download Dissertation

Abstract


Yb3+doped TeO2-ZnO-B2O3、TeO2-ZnO-Bi2O3、TeO2-Nb2O5-Ba（PO3）2basedtellurite glasses were prepared by melt-quenching method. Spectroscopic and laserproperties were investigated for high-power laser using. Compositional effect on theYb3+spectroscopic properties and base glass structure were studied by various testssuch as DSC, Raman Spectra, FTIR and absorption spectrum. The normal process ofthis study is started by glass forming region. Then the fluorides, oxides compositionswere introduced into glass networks. Effects of the compositions were studied.Meanwhile, several of dehydration process is also presented in this work to refiningthe glass to get rid of OH-groups. The valuable results of this thesis are as follows:1. TeO2-ZnO-Bi2O3-1wt%Yb2O3tellurite glasses were synthesized. Emissioncross-section and energy split diagram of Yb3+ion from2F5/2to2F7/2transition havebeen obtained from absorption and emission measurements of samples at roomtemperature. The maximum values of integrated absorption （∑abs） and emissioncross-sections are11.79pm2and1.62pm2in TeO2-ZnO-Bi2O3based glass, with thelifetime1.02ms. Importation of BiF3decreases the OH-concentration and enhancesthe transmittance spectrum at3247cm-1（about3μm）. More importantly, thefluorescence lifetime is prolonged to1.02ms. Compared with reported works, theYb3+-doped TeO2-ZnO-Bi2O3based glass has the largest emission cross-section1.62pm2and long fluorescence lifetime.2. With the previous research, Yb3+doped phosphate glasses have a longlifetime. According to the conclusion, the Yb3+doped TeO2-Nb2O5-Ba（PO3）2will haslong fluorescence lifetime. Besides, this glass system has excellent thermal stabilityaccording to reported studies. Barium phosphate effects on the Yb3+dopedTeO2-Nb2O5-Ba（PO3）2has been studied. Without the dehydration process, the lifetimehas reached to0.93ms which is excellent in Yb3+doped tellurite glasses. Besides, theemission cross-section are obtained with different methods. Considering the processing of calculation, the RM method is the best way to calculate the emissioncross-section.3. New kinds of Yb2O3-doped boro-tellurite TeO2-ZnO-B2O3based glasseswere prepared by introducing alkaline-earth fluorides （MgF2, CaF2, SrF2, and BaF2）.Their structural and spectroscopic properties were investigated by Raman andabsorption spectra measurements. The OH-can have obviously effect onfluorescence lifetime of Yb3+， when OH-concentration is higher thanNOH=4.66×1019cm-3. For TeO2-ZnO-B2O3-BaF2glass system, the peak values ofintegrated absorption and emission cross-sections achieve7.44×104pm3and1.416pm2, respectively.4. Series of TeO2-ZnO-B2O3-1wt%Yb2O3tellurite glasses with heavy metaloxides （PbO, Nb2O5, La2O3, Bi2O3） contained were synthesized. The thermal stabilityproperties of the glasses were studied by DSC. The values of integratedabsorption（∑abs） and emission cross-sections（emi） are7.751pm2and1.41pm2inTeO2-ZnO-B2O3-La2O3glass, with the lifetime0.67ms. Heavy metal oxidesenhanced thermal stability of TeO2-ZnO-B2O3glasses exhibit a ΔT（Tx-Tg）=171.1K.While the RAP, BSP dehydration process showed that POCl3has the best dehydrationability in boro-tellurite glass. More importantly, chlorides can enlarge the emissioncross-section in the RAP process.

Related Dissertations

  1. Research the Electromagnetic Interference Characteristics of the Mobile Phone Signal to the Microprocessor-based Protection Based on a Reciprocity Approach,TN03
  2. Theoretical Study and Application of Dual Reciprocity Hybrid Boundary Node Method,TP301.6
  3. Theory and Application of Hybrid Boundary Node Method Based on Dual Reciprocity Method,O241
  4. Theory of Hybrid Boundary Node Method and Its Application to Thin Plate Problems,O157.5
  5. BEM and FEM for Some Kinds of Elliptic Variational Inequalities,O241.82
  6. The Research of Biharmonic Equation of Variational Inequality and Boundary Element Method,O175.8
  7. The Mrm-Bem Analysis of a Kind of Elliptic Partial Differential Equation Boundary Value Problem,O175.8
  8. Study on Hermetic EDGE Sealing of Anodic Bonding for Vacuum Glazing,TQ171.1
  9. The Investigations on the Characteristics and Mechanism of NIR Emission from Bi-doped Silicophosphate Glasses,TQ171.1
  10. Preparation and Properties of lead-free glass powder,TQ171.6
  11. Preparation of Superhydrophobic Coating and Study of Application,TQ171.68
  12. Synthesis of Hollow Glass-Ceramics Microspheres Via Template Method,TQ171.733
  13. Preparation of technical high crystallinity transparent glass ceramics,TQ171.1
  14. Preparation and Luminescence Properties of Ce, RE(Pr/Sm) Dope YAG Glass Ceramics,TQ171.733
  15. Design on the Structure and Control System of Ultra-small Batch-type Glass Fused Frunace,TQ171.6
  16. Study on Preparation, Characterization and Adsorptive Performance of Porous Glasses,TQ171.1
  17. Study on Dielectric Properties and Optical Basicity of Aluminoborosilicate Glasses,TQ171.1
  18. Tb ~ (3)-Tm ~ (3)-Yb ~ (3) the nature and mechanism of upconversion luminescence codoped oxyfluoride glass,TQ171.112
  19. Study on Preparation and Optical Properties of Sm3+ Doped MAS System Glass-Ceramics,TQ171.1
  20. The Research of Lead-Free Low Melting Glass for Electronic Sealing,TQ171.1
  21. Study on PTA Thin Film and Its Adulterant Thin Films Glass Optical Waveguide Sensing Element,TQ171.7

CLC: > Industrial Technology > Chemical Industry > Silicate > Glass Industry > Basic theory
© 2012 www.DissertationTopic.Net  Mobile