Low diameter optical fiber
AssigneeCorning Incorporated
InventorsDana Craig Bookbinder, Steven Bruce Dawes, Inna Igorevna Kouzmina, Ming-Jun Li, Manuela Ocampo, Pushkar Tandon
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Abstract
Small-radius coated optical fibers having large mode field diameter and low bending losses. The coated fiber may have an outer radius of 110 μm or less, while providing a mode field diameter of 9.0 μm or greater and a bending loss when wrapped about a 15 mm mandrel of 0.5 dB/km or less at wavelength of 1550 nm. The coated fiber may have a mode field diameter of 9.2 μm or greater and may have a bending loss at 1550 nm of 0.25 dB/km or less when wrapped about a 20 mm mandrel or a bending loss at 1550 nm of 0.02 dB/km or less when wrapped about a 30 mm mandrel.
Claims24
An optical fiber comprising:
- a core, said core having an outer radius r1;
- a cladding surrounding said core, said cladding having an outer radius r4;
- a primary coating surrounding said cladding, said primary coating having an outer radius r5, said primary coating having an in situ modulus of 0.50 MPa or less;
- and
- a secondary coating surrounding said primary coating, said secondary coating having an outer radius r6, said secondary coating having an in situ modulus of 1500 MPa or greater;
- wherein said outer radius r6 is 110 μm or less, said fiber has a mode field diameter of greater than 9 μm at 1310 nm, a cable cutoff wavelength of 1260 nm or less, a zero dispersion wavelength λ0 in the range 1300 nm≦λ0≦1324 nm, and said fiber exhibits a bend loss at a wavelength of 1550 nm, when turned about a mandrel having a diameter of 20 mm, of less than 0.5 dB/turn.
Dependencies are inferred from the claim text.