According to at least one embodiment a graded index multimode fiber comprises: (i) a silica based core co-doped with GeO2 and 1 to 12 mole % P2O5; the core having a dual alpha, 1 and 2, where 1.812.4 and 1.922.4 at the wavelength () range between 840 and 1100 nm; and (ii) a silica based cladding region surrounding the core, wherein the fiber has a numerical aperture NA and 0.185NA0.25 (more preferably 0.185NA0.23). Preferably, the silica based cladding region surrounding the core has refractive index lower than that of pure silica.
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机译:根据至少一个实施方案,渐变折射率多模光纤包括:(i)共掺杂有GeO 2和1至12摩尔%P 2 O 5的二氧化硅基纤芯;和芯具有双α,1和2,其中在波长(λ)处的1.812.4和1.922.4在840和1100nm之间; (ii)围绕纤芯的二氧化硅基包层区域,其中纤维具有数值孔径NA和0.185NA0.25(更优选为0.185NA0.23)。优选地,围绕芯的基于二氧化硅的包层区域的折射率低于纯二氧化硅的折射率。
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