掺镨氟化镓铟玻璃的研究

STUDIES OF Pr 3+ _DOPED GaF 3/InF 3_BASED GLASSES

合成了一族新的氟化镓铟玻璃，研究了ＩｎＦ３－ＰｂＦ２－ＺｎＦ２－ＣｄＦ２（ＢａＦ２）体系和ＧａＦ３－ＣｄＦ２－ＰｂＦ２（ＺｎＦ２）体系的玻璃形成区域．经玻璃组分试验研究得到了稳定的３０ＰｂＦ２－２０ＧａＦ３－１５ＩｎＦ３－２０ＣｄＦ２－１５ＺｎＦ２（简化为ＰＧＩＣＺ）玻璃，通过优化细调组分，可制得１４ｍｍ厚块玻璃和具有芯皮结构的光纤．红外和Ｒａｍａｎ光谱研究结果表明：ＰＧＩＣＺ玻璃具有较氟锆酸盐（简化为ＺＢＬＡＮ）玻璃更宽的红外透过范围和更低的声子能量．Ｐｒ３＋掺杂ＰＧＩＣＺ玻璃的１Ｇ４能级寿命可达２１０μｓ，其量子效率为７％，是通常ＺＢＬＡＮ玻璃的一倍，故它是最可能作为掺镨光纤放大器的实用化体系之一．

New fluoride glasses based on gallium and indium fluorides were explored. Researches on glass forming regions, stable composition and physical properties of InF 3-PbF 2-ZnF 2-Cd(Ba)F 2 and GaF 3-CdF 2-Pb(Zn)F 2 systems were carried out systematically. Stable 30PbF 2-20GaF 3-15InF 3-20CdF 2-15ZnF 2 (PGICZ) glasses were obtained. The decrease of the phonon energy in PGICZ, by comparison with current ZrF 4-BaF 2-LaF 3-AlF 3-NaF (ZBLAN) glass was confirmed by IR and Raman studies. For Pr 3+ _doped PGICZ glasses the 1 G 4 fluorescence lifetime of 210 μs and the corresponding quantum efficiency of 7% are achieved, which are two times higher than those of ZBLAN (only 110 μs and 3%).