OPTICAL FIBER CABLE

• Main Authors: SATO SHINNOSUKE, OSATO TAKESHI, NAMAZUE AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 27.12.2021
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

To provide an optical fiber cable capable of suppressing an increase in transmission loss even when being bent in a direction perpendicular to a neutral line.SOLUTION: An optical fiber cable 1 comprises: a core 2 having a plurality of optical fibers 2a; a sheath 4 housing the core 2; a pair of outside tension members 5 embedded in the sheath 4 with the core 2 held therebetween; and a pair of inside tension members 3 disposed on an inside of the sheath 4 in a radial direction with the core 2 held therebetween. In a cross-sectional view, each of the pair of inside tension members 3 is positioned within a range of -45° to +45° around a center of the core 2 with a neutral line L connecting each of centers of the pair of outside tension members 5 as a reference.SELECTED DRAWING: Figure 1 【課題】中立線に垂直な方向に曲げられた場合でも伝送損失の増大を抑制可能な光ファイバケーブルを提供する。【解決手段】光ファイバケーブル１は、複数の光ファイバ２ａを有するコア２と、コア２を収容するシース４と、コア２を間に挟むようにシース４に埋設された一対の外側抗張力体５と、コア２を間に挟むようにシース４の径方向内側に配置された一対の内側抗張力体３と、を備え、横断面視において、一対の外側抗張力体５の中心同士を結ぶ中立線Ｌを基準として、一対の内側抗張力体３はそれぞれ、コア２の中心回りに−４５°から＋４５°の範囲内に位置している。【選択図】図１