Optical fiber cable and cable with connector
An optical fiber cable includes a cable core including a plurality of optical fibers, at least one tensile strength member provided along the cable core, and a sheath configured to cover the cable core from an outside and enclose the tensile strength member. The tensile strength member is provided at one location on the sheath in a cross-sectional view. A core density obtained by dividing the number of the plurality of optical fibers by a cross-sectional area of the cable is 1.5 core/mm 2 or more.
1 . An optical fiber cable comprising:
a cable core including a plurality of optical fibers;
a plurality of tensile strength members each provided along the cable core; and
a sheath configured to cover the cable core from an outside and enclose the tensile strength member,
wherein the plurality of tensile strength members is provided adjacent to each other at only one location on the sheath in a cross-sectional view, and
wherein a core density obtained by dividing the number of the plurality of optical fibers by a cross-sectional area of the cable is 1.5 core/mm 2 or more.
2 . The optical fiber cable according to claim 1 ,
wherein the tensile strength member is fiber reinforced plastic (FRP).
3 . The optical fiber cable according to claim 1 ,
wherein a Young's modulus of the tensile strength member is 400 MPa or more and 700 MPa or less.
4 . The optical fiber cable according to claim 1 ,
wherein a product (an ES product) of a Young's modulus and a cross-sectional area of the tensile strength member is 1000 N or more and 10000 N or less.
5 . The optical fiber cable according to claim 1 ,
wherein the tensile strength member is steel wire.
6 . The optical fiber cable according to claim 1 ,
wherein a diameter of the tensile strength member is larger than a minimum thickness of the sheath.
7 . The optical fiber cable according to claim 1 ,
wherein, when the optical fiber cable is bent at a bending radius 10 times a radius of the optical fiber cable, the tensile strength member does not buckle.
8 . The optical fiber cable according to claim 1 ,
wherein the sheath contains a flame-retardant inorganic material.
9 . The optical fiber cable according to claim 1 ,
wherein the sheath is an ethylene-vinyl acetate copolymer resin (an EVA resin).
10 . The optical fiber cable according to claim 1 ,
wherein a Young's modulus of the sheath is 400 MPa or more and 800 MPa or less.
11 . The optical fiber cable according to claim 1 ,
wherein a softening point temperature of the sheath is 40 deg-C or higher and 70 deg-C or lower.
12 . The optical fiber cable according to claim 1 ,
wherein the tensile strength member is helically provided around the cable core in a longitudinal direction of the optical fiber cable.
13 . The optical fiber cable according to claim 1 ,
wherein a ratio of an area of the tensile strength member to an area of the sheath in the cross-sectional view is 0.04 or more.
14 . The optical fiber cable according to claim 1 ,
wherein the optical fiber cable is a cable for air blown installation.
15 . A cable with a connector, the cable comprising:
the optical fiber cable according to claim 1 ; and
a multi-fiber connector to which the plurality of optical fibers are attached at one end of the optical fiber cable.
16 . The optical fiber cable according to claim 1 , wherein the plurality of tensile strength members is in contact with each other.