AIR BLOWN OPTICAL FIBER UNIT FOR REDUCING MICRO-BENDING LOSS
Disclosed is an air blown optical fiber unit for reducing a micro-bending loss. The air blown optical fiber unit includes at least one optical fiber; a buffer layer surrounding the optical fiber and made of polymer resin having a Young's modulus of 0.05 to 2 kgf/mm; and an outer layer surrounding the buffer layer and having beads attached to a surface thereof, the outer layer being made of polymer resin, wherein the buffer layer has a thickness of 70 to 140 μm. This optical fiber unit may reduce a micro-bending loss of an optical fiber by buffering an external force applied to the optical fiber due to beads attached to its surface.
1 . An optical fiber unit, comprising:
at least one optical fiber;
a buffer layer surrounding the optical fiber and made of polymer resin having a Young's modulus of 0.05 to 2 kgf/mm 2 ; and
an outer layer surrounding the buffer layer and having beads attached to a surface thereof, the outer layer being made of polymer resin,
wherein the buffer layer has a thickness of 70 to 140 μm.
2 . The optical fiber unit according to claim 1 ,
wherein 4-core optical fibers are used, and
wherein the buffer layer has a thickness of 70 to 110 μm.
3 . The optical fiber unit according to claim 1 ,
wherein 8-core optical fibers are used, and
wherein the buffer layer has a thickness of 70 to 140 μm.
4 . The optical fiber unit according to claim 1 ,
wherein the outer layer has a Young's modulus of 30 to 100 kgf/mm 2 .
5 . The optical fiber unit according to claim 1 ,
wherein 4-core optical fibers are used, and
wherein the buffer layer has a diameter of 920 to 1000 μm.
6 . The optical fiber unit according to claim 1 ,
wherein 8-core optical fibers are used, and
wherein the buffer layer has a diameter of 1300 to 1370 μm.