摘要:
A transparent or translucent inorganic material, especially a glass-ceramic and/or composite material, is provided with a low average thermal longitudinal expansion coefficient, .alpha., of from -1.times.10.sup.-6 K.sup.-1 to +2.times.10.sup.-6 K.sup.-1 in the temperature range of -50.degree.-700.degree. C., with the following composition (in weight percent):Li.sub.2 O, 2.5-6.0; Na.sub.2 O, 0-4.0; K.sub.2 O, 0-4.0; Na.sub.2 O+K.sub.2 O, 0.2-4.0; MgO, 0-3.0; ZnO, 0-3.0; BaO, 0-3.5; CaO, 0-1.0; SrO, 0-1.0; Al.sub.2 O.sub.3, 18-28; SiO.sub.2, 50-70; TiO.sub.2, 1.0-7.0; ZrO.sub.2, 0-3.5; TiO.sub.2 +ZrO.sub.2, 1.0-7.0; and P.sub.2 O.sub.5, 0-8.0,optionally with coloring components (in weight percent):V.sub.2 O.sub.5, 0-2.0; Cr.sub.2 O.sub.3, 0-2.0; MnO, 0-2.0; Fe.sub.2 O.sub.3, 0-2.0; CoO, 0-2.0; and NiO, 0-2.0,optionally, conventional refining agents, such as As.sub.2 O.sub.3, Sb.sub.2 O.sub.3, NaCl, and Ce.sub.2 O.sub.3, and optionally with high quartz (h-quartz) and/or keatite mixed crystals as the essential crystalline phase. The material exhibits a settable transmission and is suitable, in particular, for the production of plates, pipes, and molded articles, wherein the inorganic material has a water content of less than 0.03 mol/l.
摘要:
The stepped optical fiber has a core glass member and a surrounding cladding glass member. It has a high numerical aperture (NA)≧0.50. The core glass member preferably has a zinc-containing composition including, in % by weight, SiO2, 42 to 53; ZnO, 16 to 38; PbO, 1 to 20; Na2O,
摘要翻译:阶梯式光纤具有芯玻璃构件和周围的包层玻璃构件。 它具有高数值孔径(NA)> = 0.50。 核心玻璃构件优选具有含锌组合物,其包含以重量%计的SiO 2,42至53; ZnO,16〜38; PbO,1〜20; Na 2 O,<14; K 2 O,<12; ZnO和PbO> = 30之和,Na 2 O 2和K 2 O 2之和为> = 2。 与该芯玻璃相容的包层玻璃组合物以重量%计含有SiO 2,60〜72, B 2 O 3,<20; AL 2 O 3,<10; NA 2 O,<18; 和K 2 O,<15。 所得到的光纤具有低衰减,非常中性的色彩传输和低制造成本。 其他包覆玻璃组合物导致在芯玻璃边界层处具有太多结晶的相当差的性质。 还准备了具有甚至更低孔径值> = 0.48的芯玻璃的环保无铅实施例。
摘要:
Glass composition ranges are described which permit the introduction of laser activators into fluorphosphate glass with exceptionally high fluorine content while forming glasses of high crystallization stability and permitting the realization of large melt volumes. The high fluorine content imparts to the glasses an exceptionally low nonlinear refractive index n.sub.2 down to O,4 .times.10.sup.-13 esu.
摘要:
Arsenic pentoxide glasses characterized by containing 8 - 60 wt.% arsenic pentoxide and correspondingly 92 - 40 wt.% polyvalent metal fluorides exhibit improved processing characteristics while maintaining outstanding optical properties when prepared from a formula containing at least 0.5% of at least one member selected from the group consisting of bromides, chlorides, sulfates and metal oxides.
摘要:
The stepped optical fiber has a core glass member and a surrounding cladding glass member. It has a high numerical aperture (NA)≧0.50. The core glass member preferably has a zinc-containing composition including, in % by weight, SiO2, 42 to 53; ZnO, 16 to 38; PbO, 1 to 20; Na2O,
摘要翻译:阶梯式光纤具有芯玻璃构件和周围的包层玻璃构件。 它具有高数值孔径(NA)> = 0.50。 核心玻璃构件优选具有含锌组合物,其包含以重量%计的SiO 2,42至53; ZnO,16〜38; PbO,1〜20; Na 2 O,<14; K 2 O,<12; ZnO和PbO> = 30之和,Na 2 O 2和K 2 O 2之和为> = 2。 与该芯玻璃相容的包层玻璃组合物以重量%计含有SiO 2,60〜72, B 2 O 3,<20; AL 2 O 3,<10; NA 2 O,<18; 和K 2 O,<15。 所得到的光纤具有低衰减,非常中性的色彩传输和低制造成本。 其他包覆玻璃组合物导致在芯玻璃边界层处具有太多结晶的相当差的性质。 还准备了具有甚至更低孔径值> = 0.48的芯玻璃的环保无铅实施例。
摘要:
A glass when in the form of an optical fiber having an optical loss of not more than 150 dB/km, high transparency, a high numerical aperture, and a high flexural strength, said glass being especially suitable for optical fibers and consisting essentially of:SiO.sub.2 : 65 - 75 mol-%; (38 - 46% by weight);R.sub.2 o: 4 - 17 mol-%; (4 - 13% by weight);PbO: 16 - 25 mol-%; (42 - 55% by weight); wherein R.sub.2 O is Na.sub.2 O, K.sub.2 O or Cs.sub.2 O or mixtures thereof, preferably not more than 3.0 mol % Na.sub.2 O, and with the provision that the molar ratio of SiO.sub.2 : PbO is 2.5 - 4.0.