Patent ID: 8798424
Filing Date: 2014-08-05
Classification: C03B,G02B

Abstract:
1. A single-mode optical fiber, comprising: a central core surrounded by an outer optical cladding, said central core having a radius (a) and a refractive-index difference (Dn an inner depressed cladding positioned between said central core and said outer optical cladding, said inner depressed cladding having an outer radius (r a ring positioned between said inner depressed cladding and said outer optical cladding, said ring having an inner radius (r an outer depressed cladding positioned between said ring and said outer optical cladding, said outer optical cladding having an outer radius (r wherein said central core has a volume (V wherein, Dn(r)=n n n wherein said outer depressed cladding has a volume of between about 15 μm wherein, Dn(r)=n n n