Compliant optical fiber
An optical fiber including a core region having an outer radius r 1 in a range from 4.0 μm to 8.0 μm and a relative refractive index profile Δ 1 with a maximum relative refractive index Δ 1max in a range from 0.20% to 0.50%, a cladding region comprising a trench cladding region having a minimum relative refractive index Δ 3 min greater than −0.60% and less than −0.10%, and a trench volume greater than 30%-μm 2 and an outer cladding region having a relative refractive index Δ 4 in a range from −0.10% to 0.10%. The optical fiber also including a primary coating and a secondary coating. 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, a zero dispersion wavelength between 1300 nm and 1324 nm, and low macrobend loss at 1550 nm.
1 . An optical fiber comprising:
a core region having an outer radius r 1 in a range from 4.0 μm to 8.0 μm and a relative refractive index profile Δ 1 with a maximum relative refractive index Δ 1max 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 r 2 , an outer radius r 3 , a relative refractive index Δ 3 with a minimum relative refractive index Δ 3 min greater than −0.60% and less than −0.10%, and a trench volume greater than 30%-μm 2 ; and
an outer cladding region surrounding and directly adjacent to the trench cladding region, the outer cladding region having an outer radius r 4 greater than 37.5 μm and less than 50.0 μm and a relative refractive index Δ 4 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 r 5 , an in situ modulus in the range from 0.05 MPa to 0.30 MPa and a thickness r 5 -r 4 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 r 6 less than or equal to 85.0 microns, a Young's modulus greater than 1600 MPa and a thickness r 6 -r 5 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.
2 . The optical fiber of claim 1 , wherein the shape of the trench cladding region is triangular.
3 . The optical fiber of claim 1 , wherein the outer cladding region has a radius r 4 in the range from 37.5 to 42.5 μm.
4 . The optical fiber of claim 1 , wherein the thickness r 5 -r 4 is in the range from 11 microns to 20 microns.
5 . The optical fiber of claim 1 , wherein the thickness r 6 -r 5 is in the range from 9 microns to 17 microns.
6 . The optical fiber of claim 1 , wherein the optical fiber has a puncture resistance greater than 30 g.
7 . The optical fiber of claim 1 , wherein the optical fiber has a mode field diameter at 1310 nm of greater than 9.0 microns.
8 . The optical fiber of claim 1 , wherein the optical fiber has a mode field diameter at 1310 nm of greater than 9.2 microns.
9 . An optical fiber comprising:
a core region having an outer radius r 1 in a range from 4.0 μm to 8.0 μm and a relative refractive index profile Δ 1 with a maximum relative refractive index Δ 1max 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 r 2 , an outer radius r 3 , a relative refractive index Δ 3 with a minimum relative refractive index Δ 3 min greater than −0.60% and less than −0.10%, and a trench volume greater than 30% μm 2 ; and
an outer cladding region surrounding and directly adjacent to the trench cladding region, the outer cladding region having an outer radius r 4 greater than 37.5 μm and less than 45.0 μm and a relative refractive index Δ 4 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 r 5 , an in situ modulus in the range from 0.05 MPa to 0.30 MPa and a thickness r 5 -r 4 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 r 6 less than or equal to 85.0 microns, a Young's modulus greater than 1600 MPa and a thickness r 6 -r 5 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.
10 . The optical fiber of claim 9 , wherein the shape of the trench cladding region is triangular.
11 . The optical fiber of claim 9 , wherein the outer cladding region has a radius r 4 in the range from 37.5 to 42.5 μm.
12 . The optical fiber of claim 9 , wherein the thickness r 5 -r 4 in the range from 11 microns to 20 microns.
13 . The optical fiber of claim 9 , wherein the thickness r 6 -r 5 in the range from 9 microns to 16 microns.
14 . The optical fiber of claim 9 , wherein the optical fiber has a puncture resistance greater than 30 g.
15 . The optical fiber of claim 9 , wherein the optical fiber has a mode field diameter at 1310 nm of greater than 9.0 microns.
16 . The optical fiber of claim 9 , wherein the optical fiber has a mode field diameter at 1310 nm of greater than 9.2 microns.
17 . An optical fiber comprising:
a core region having an outer radius r 1 in a range from 4.0 μm to 8.0 μm and a relative refractive index profile Δ 1 with a maximum relative refractive index Δ 1max 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 r 2 , an outer radius r 3 , a relative refractive index Δ 3 with a minimum relative refractive index Δ 3 min greater than −0.60% and less than −0.10%, and a trench volume greater than 30%-μm 2 ; and
an outer cladding region surrounding and directly adjacent to the trench cladding region, the outer cladding region having an outer radius r 4 greater than 37.5 μm and less than 45.0 μm and a relative refractive index Δ 4 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 r 5 , an in situ modulus in the range from 0.05 MPa to 0.30 MPa and a thickness r 5 -r 4 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 r 6 less than or equal to 85.0 microns, a Young's modulus greater than 1600 MPa and a thickness r 6 -r 5 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.
18 . The optical fiber of claim 17 , wherein the shape of the trench cladding region is triangular.
19 . The optical fiber of claim 17 , wherein the outer cladding region has a radius r 4 in the range from 37.5 to 42.5 μm.
20 . The optical fiber of claim 17 , wherein the thickness r 5 -r 4 in the range from 11 microns to 20 microns.
21 . The optical fiber of claim 17 , wherein the thickness r 6 -r 5 in the range from 9 microns to 16 microns.
22 . The optical fiber of claim 17 , wherein the optical fiber has a puncture resistance greater than 30 g.
23 . The optical fiber of claim 17 , wherein the optical fiber has a mode field diameter at 1310 nm of greater than 9.2 microns.