Corning Incorporated
SINGLE MODE OPTICAL FIBERS WITH LOW CUTOFF WAVELENGTH HIGH MECHANICAL RELIABILITY

Abstract:

The optical fibers disclosed is a single mode optical fiber having a core region and a cladding region surrounding and directly adjacent to the core region. The core region can have a radius r.sub.1 in a range from 3.0 microns to 6.0 microns and a core volume V.sub.1 less than 6.0%-micron.sup.2. The cladding region can include a first outer cladding region and a second outer cladding region surrounding and directly adjacent to the first outer cladding region. The first outer cladding region can have a radius r.sub.4a, the second outer cladding region can have a radius r.sub.4b less than or equal to 65 microns and comprising silica based glass doped with titania. The disclosed single mode optical fiber can have a fiber cutoff wavelength .lamda..sub.CF less than 1530 nm.