Patent ID: 11860408
Assignee: CORNING INCORPORATED
Field: Optics (Instruments)
Classification: CPC G  C | IPC G

Claim 0:
1. An optical fiber comprising:
a core region, the core region having an outer radius r1 in a range from 4.0 μm to 8.0 μm and a relative refractive index profile Δ1 with a maximum relative refractive index Δ1max in a range from 0.20% to 0.50%;
a cladding region surrounding and directly adjacent to the core region, the cladding region comprising:
a trench cladding region surrounding the core region, the trench cladding region having an inner radius r2, an outer radius r3, a thickness r3−r2 greater than 10 μm, a relative refractive index Δ3 with a minimum relative refractive index Δ3min greater than −0.30% and less than 0.00%, and a trench volume greater than 30% μm2; and
an outer cladding region surrounding and directly adjacent to the trench cladding region, the outer cladding region having an outer radius r4 and a relative refractive index Δ4 in a range from −0.10% to 0.10%; and

wherein the optical fiber has a macrobend loss at 1550 nm, in accordance with a mandrel wrap test using a mandrel with a diameter of 15 mm, less than 0.4000 dB/turn; and
wherein the optical fiber has a macrobend loss at 1550 nm, in accordance with a mandrel wrap test using a mandrel with a diameter of 30 mm, less than 0.0040 dB/turn.