Optical fiber for high density cable

Abstract

The disclosure provides optical fibers with a low coated diameter and low sensitivity to microbending. Low microbending sensitivity is achieved by (1) configuring the relative refractive index profile of the optical fiber to have a mode field diameter less than or equal to 8.2 μm at 1310 nm and (2) reducing the in situ modulus of the primary coating to less than or equal to 0.25 MPa. The optical fiber preferably includes a secondary coating with an in situ modulus greater than or equal to 1200 MPa. The outer radius of the secondary coating is less than or equal to 82.5 μm. The relative refractive index profile of the optical fiber preferably includes a trench cladding region with a moat volume greater than or equal to 30% Δ-μm2. The optical fibers enable high fiber density in cables.

Dependencies are inferred from the claim text.