Compliant optical fiber

An optical fiber comprising:

• a 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 relative refractive index Δ3 with a minimum relative refractive index Δ3 min greater than −0.60% and less than −0.10%, 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 greater than 37.5 μm and less than 45.0 μm and a relative refractive index Δ4 in a range from −0.10% to 0.10%;
• a primary coating surrounding and directly adjacent to the cladding region, the primary coating having a radius r5, an in situ modulus in the range from 0.05 MPa to 0.30 MPa and a thickness r5-r4 in the range from 10 microns to 22 microns;
• and
• a secondary coating surrounding and directly adjacent to the primary coating, the secondary coating having a radius r6 less than or equal to 85.0 microns, a Young's modulus greater than 1600 MPa and a thickness r6-r5 in the range from 8 microns to 17 microns;
• wherein the optical fiber has a mode field diameter at 1310 nm of greater than 8.8 microns, a cable cutoff wavelength of less than 1260 nm and a zero dispersion wavelength between 1300 nm and 1324 nm;
• 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 0.5 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 0.03 dB/10 turns.

An optical fiber comprising:

• a 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 relative refractive index Δ3 with a minimum relative refractive index Δ3 min greater than −0.60% and less than −0.10%, 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 greater than 37.5 μm and less than 45.0 μm and a relative refractive index Δ4 in a range from −0.10% to 0.10%;
• a primary coating surrounding and directly adjacent to the cladding region, the primary coating having a radius r5, an in situ modulus in the range from 0.05 MPa to 0.30 MPa and a thickness r5-r4 in the range from 10 microns to 25 microns;
• and
• a secondary coating surrounding and directly adjacent to the primary coating, the secondary coating having a radius r6 less than or equal to 85.0 microns, a Young's modulus greater than 1600 MPa and a thickness r6-r5 in the range from 8 microns to 20 microns;
• wherein the optical fiber has a mode field diameter at 1310 nm of greater than 8.8 microns, a cable cutoff wavelength of less than 1260 nm and a zero dispersion wavelength between 1300 nm and 1324 nm;
• 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 0.5 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 0.03 dB/10 turns.