Low moat volume single mode ultra-low loss fiber
AssigneeCorning Incorporated
InventorsPeter Gottfried Hebgen, Hazel Benton Matthews, III, Snigdharaj Kumar Mishra
Life of this patent
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Abstract
Embodiments of the current disclosure include low moat volume single mode ultra-low loss optical fibers. In some embodiments, a single mode optical fiber includes a first core region; a second core region surrounding and directly adjacent to the first core region, wherein a volume V of the second core region is less than or equal to 14% Δμm2; a cladding region surrounding the core region; and wherein the optical fiber has a cable cutoff of less than 1260 nm, a mode field diameter at 1310 nm of 8.6 microns to 9.7 microns, a mode field diameter at 1550 nm of 9.9 microns to 11 microns, and an attenuation at 1550 nm of less than or equal to 0.17 dB/km.
Claims20
A single mode optical fiber, comprising:
- a first core region having an α value 1.5≤α≤10, and extending to an outer radius r1, wherein 2.5 μm≤r1≤8 μm, and having a relative refractive index percent profile, Δ1(r) in % measured relative to pure silica, a minimum relative refractive index Δ1MIN, a maximum relative refractive index Δ1MAX, and the relative refractive index Δ1 measured at a radius r=2 μm, wherein −0.35≤Δ1MIN≤−0.05, and wherein −0.15≤Δ1(r=2 μm)≤0.1;
- a second core region surrounding and directly adjacent to the first core region and extending to a radius 10 μm≤r2≤22 μm and having a negative relative refractive index percent profile, Δ2(r) in %, measured relative to pure silica, with a minimum relative refractive index percent Δ2MIN, wherein −0.47%≤Δ2MIN≤−0.3% and wherein a volume V of the second core region is less than or equal to 14% Δμm2;
- a cladding region surrounding the core and comprising:
- a relative refractive index percent Δ3(r) in % measured relative to pure silica and a minimum refractive index delta Δ3MIN, and −0.45%≤Δ3≤−0.2%;
- and
- wherein the optical fiber has a cable cutoff of less than 1260 nm, a mode field diameter at 1310 nm of 8.6 microns to 9.7 microns, a mode field diameter at 1550 nm of 9.9 microns to 11 microns, and an attenuation at 1550 nm of less than or equal to 0.17 dB/km.
A single mode optical fiber, comprising:
- a first core region having an α value 1.5≤α≤10, and extending to an outer radius r1, wherein 2.5 μm≤r1≤8 μm, and having a relative refractive index percent profile, Δ1(r) in % measured relative to pure silica, a minimum relative refractive index Δ1MIN, a maximum relative refractive index Δ1MAX, and the relative refractive index Δ1 measured at a radius r=2 μm, wherein −0.3≤Δ1MIN≤−0.05, and wherein −0.15≤Δ1(r=2 μm)≤0.1;
- a second core region surrounding and directly adjacent to the first core region and extending to a radius 10 μm≤r2≤22 μm and having a negative relative refractive index percent profile, Δ2(r) in %, measured relative to pure silica, with a minimum relative refractive index percent Δ2MIN, wherein −0.47%≤Δ2MIN≤−0.3% and wherein a volume V of the second annular core region is less than or equal to 14% 4 μm2;
- a cladding region surrounding the core and comprising a relative refractive index percent Δ3(r) in % measured relative to pure silica and a minimum refractive index delta Δ3MIN, and −0.55%≤Δ3≤−0.3%;
- and
- wherein the optical fiber has a cable cutoff of less than 1530 nm, a mode field diameter at 1310 nm of 8.6 microns to 9.7 microns, a mode field diameter at 1550 nm of 9.9 microns to 11 microns and an attenuation at 1550 nm of less than or equal to 0.17 dB/km.
Dependencies are inferred from the claim text.