OPTICAL CHARACTERISTICS OF RARE-EARTH-DOPED SULFIDE GLASSES
OPTICAL CHARACTERISTICS OF RARE-EARTH-DOPED SULFIDE GLASSES
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DOI：
10.1007/bf00274635
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发表时间：
1995-07-15
期刊：
影响因子：
--
通讯作者：
HEO, J
中科院分区：
文献类型：
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作者：
HEO, J
掺有稀土元素的硫系玻璃提供了获得荧光和可能的激光作用的机会，其波长比目前从氧化物和氟化物玻璃基质中获得的波长更长。由于固有声子吸收带从长波延伸到中红外区域[1]，目前硅基固体激光器只能在可见光范围内小于3~ m范围内工作。重金属氟化物玻璃也被研究过，但它们在6-7# m波长区域的高多声子吸收与期望的发射相竞争，从而降低了中红外区域[2]的荧光效率。另一方面，硫系玻璃族具有声子能谱较低、化学稳定性好、折射率高、易制成纤维和玻璃形成区域大等特点。由于硫系玻璃的红外透射率可达12/~ m，因此选择硫系玻璃作为主体材料，以提高荧光在中红外波长的发射效率。在这些玻璃中获得激光作用的可能性取决于主体玻璃的成分和稀土的能量跃迁。本文研究了稀土元素Nd 3+、Dy 3+、Ho 3+、Er 3+和Tm 3+掺杂As2S - 3玻璃的合成和光学特性，以开发工作在中红外波段的固体激光材料。
Chalcogenide glasses doped with rare-earth elements provide an opportunity to obtain fluorescence, and possibly laser action, at longer wavelengths than presently available from oxide and fluoride vitreous hosts. Present silica-based solid state lasers are operational only from the visible out to less than 3~ m since the intrinsic phonon absorption bands extend from long wavelengths into the mid-infrared region [1]. Heavy metal fluoride glasses have also been investigated, but their high multiphonon absorption in the 6-7# m wavelength region competes with the desired emission which reduces the efficiency for fluorescence in the mid-infrared region [2].On the other hand, chalcogenide glass families possess relatively low energy phonon spectra, good chemical stability, high refractive indices, easy fibre fabrication and large glass forming regions. Because of their extended infrared transmission out to 12/~ m, chalcogenide glasses have been selected as host materials in order to enhance the emission efficiency of the fluorescence at mid-infrared wavelengths. The possibility of obtaining laser action in these glasses depends on the host glass composition and the rare earth energy transitions. This study is concerned with the synthesis and optical characterization of As2S 3 glasses doped with rare-earth elements Nd 3+, Dy 3+, Ho 3+, Er 3+ and Tm 3+ to develop solid state laser materials operating in the mid-infrared wavelength region.