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自1970年康宁玻璃公司首次获得传输损耗低达20分贝/公里的光纤以来,纤维光波导技术已有了迅速发展,其间,用于纤维的基质材料和掺杂物数目也相应地急剧增加.康宁的早期工作着重在熔石英(SiO_2),用它作为掺TiO_2和GeO_2的光纤芯的基质材料,用来制作众所周知的芯-套波导结构.随后,贝尔电话实验室用B_2O_3作包层掺杂剂,以纯石英作芯材.自此以后,经检验过的掺杂剂数目遍及整个周期表的元素.此外,还开拓了大量基质玻璃组分,其中包括各种硅酸盐玻璃,也有非硅酸盐玻璃,甚至有多是卤化物,对于(?)的应用,是优
Since the first acquisition by Corning Glass in 1970 of fibers with transmission losses as low as 20 dB / km, fiber optic waveguide technology has been rapidly developed, with a correspondingly rapid increase in the amount of matrix material and dopants used in the fiber. Early work focused on fused silica (SiO 2), which was used as a matrix material for TiO 2 and GeO 2 -doped core fibers to fabricate the well-known core-shell waveguide structure. Subsequently, Bell Telephone Laboratories used B 2 O 3 as a cladding dopant , With pure quartz as the core material, has since examined the number of dopants throughout the periodic table, in addition to developing a large number of matrix glass components, including various silicate glasses, as well as non-silicic acid Salt glass, and even more is a halide, for (?) Applications, is excellent