Stranded optical fiber cable

An optical fiber cable, comprising:

• a first primary-capillary comprising glass and surrounding an interior passage thereof;
• a first nested-capillary positioned within the interior passage of the first primary-capillary,
• wherein the first nested-capillary only fills a portion of the interior passage of the first primary-capillary, and wherein the first nested-capillary also comprises an open space extending lengthwise therein;
• a cladding having a round cross-section and surrounding the first primary-capillary and in turn the first nested-capillary,
• wherein the first primary-capillary is fixed to an interior surface of the cladding;
• two other primary-capillaries in addition to the first primary-capillary, the two other primary-capillaries also fixed to the interior surface of the cladding;
• wherein portions of exteriors of each of the first primary-capillary and the two other primary-capillaries line a hollow core therebetween, the hollow core configured to convey an optical signal communicated lengthwise therealong, whereby the cladding, the first primary-capillary, the first nested-capillary, and the two other primary-capillaries each form part of a first optical fiber;
• a coating layer surrounding the first cladding of the first optical fiber, wherein the coating layer comprises an ultra-violet-light curable and/or thermoset polymer;
• a first buffer tube comprising thermoplastic and having a cross-sectional dimension orthogonal to a length thereof, measured from an exterior thereof through a geometric center thereof and to an opposing exterior thereof, that is at least twice that of the coating layer of the first optical fiber;
• wherein the first buffer tube surrounds the first optical fiber;
• two other buffer tubes in addition to the first buffer tube, wherein the two other buffer tubes each surround at least one other optical fiber;
• a strength member comprising fiber-reinforced plastic;
• a cable jacket surrounding the strength member, the first buffer tube, and the two other buffer tubes;
• wherein each of the first buffer tube and the two other buffer tubes are stranded around the strength member within the cable jacket such that the first optical fiber has a longer length than the optical fiber cable, and
• wherein the first optical fiber is loosely positioned in the first buffer tube and/or the first buffer tube is loosely positioned within the cable jacket such that the first optical fiber is at least partially free to move relative to the first buffer tube and/or relative to the strength member, to a lower stress position, as the cable bends in an arc of 500 mm, twists 3° per 2 m length, and/or stretches by 0.3% strain.