CPC G02B 6/12 (2013.01) [C03C 13/045 (2013.01); C03C 25/105 (2013.01); C08F 22/1006 (2020.02); C08F 22/14 (2013.01); C08G 18/3221 (2013.01); C08G 18/72 (2013.01); G02B 6/02033 (2013.01); G02B 2006/12038 (2013.01); G02B 2006/12073 (2013.01); G02B 2006/12088 (2013.01)] | 27 Claims |
1. A single mode optical fiber, comprising:
a core region, the core region having a radius r1 in a range from 3 μm to 7 μm and a relative refractive index profile Δ1 having a maximum relative refractive index Δ1max in the range from 0.25% to 0.50%; and
a cladding region surrounding and directly adjacent to the core region, the cladding region including a first outer cladding region and a second outer cladding region surrounding and directly adjacent to the first outer cladding region, the first outer cladding region having a radius r4a, the second outer cladding region having a radius r4b less than or equal to 45 μm, a relative refractive index Δ4b greater than 0.20%, and comprising silica based glass doped with titania.
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