Optical fiber for data centers

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.