抄録
Heavy metal oxide glasses in the PbO-Bi2O3-Ga2O3system have been investigated as potential candidates for new IR transmitting materials. Since these glasses do not contain any conventional glass former, the molecular structure of the glass has been a subject of many research works. In addition, due to their low phonon vibration energy, these glasses also have been considered as good hosts for rare-earth ions. Rare-earth transition, which is usually quenched in normal oxide glass hosts, can radiatively proceed in this glass because of the low phonon energy. This study reports the overview of the works done on the molecular structure of and rare-earth emission properties in heavy metal oxide glasses. Structure of ternary glass will be proposed based on Raman, IR, XPS and EXAFS spectrocopy. Potentials of these glasses as new host materials for lasers and fiber-optic amplifiers will be presented with special emphasis on S-band and O-band.
