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近年来,理论上已预示很多卤化物在红外波谱范围内有极低的光传输损耗,由KRS-5、TlBr、KCl、CsI、AgBr等卤化物晶体也拉制了红外光纤,例如采用挤压工艺得到了KRS-5的多晶光纤,长度连续可达200米。这类光纤要获得良好的波导结构是困难的。我们试制了二种氨化物玻璃光导纤维。第一种是以氟化物玻璃为芯料,氟46为包层的红外光纤。芯料玻璃的配方以及折射率见表1所示。
In recent years, it has been theoretically predicted that many halides have very low optical transmission loss in the infrared spectral range. Infrared optical fibers are also drawn from halide crystals such as KRS-5, TlBr, KCl, CsI, AgBr, for example by extrusion KRS-5 polycrystalline optical fiber technology has been achieved, up to 200 meters in length. Such optical fiber to obtain a good waveguide structure is difficult. We experimented with two types of amide glass optical fibers. The first is fluoride glass as the core material, fluorine 46 cladding infrared fiber. Core glass formulations and refractive index shown in Table 1.