OPTISK FIBER MED LAVT BØJNINGSTAB

摘要

One embodiment of a single mode optical fiber includes: a graded index central core region having outer radius r1 and refractive index Delta1; a cladding region comprising (i) a first inner cladding region having an outer radius r2<10 microns and refractive index Delta2 and 0.65@r1/r2@1; (ii) and a second inner cladding region having an outer radius r3>10 microns and comprising a minimum refractive index Delta3, wherein said second cladding region has at least one region with a refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the inner cladding region and comprising refractive index Delta4, wherein Delta1>Delta2>Delta3, Delta3